CN115592190A

CN115592190A - Pipe cutting machine

Info

Publication number: CN115592190A
Application number: CN202211253605.2A
Authority: CN
Inventors: 刘垒垒; 刘超凡; 柳丽影
Original assignee: Taizhou Tengte Technology Co ltd
Current assignee: Taizhou Tengte Technology Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-01-13

Abstract

The invention belongs to the technical field of bar cutting, and particularly relates to a pipe cutting machine, which comprises: the pipe cutting machine comprises a pipe cutting machine body, wherein a feeding port is formed in one side of the pipe cutting machine body; the feeding mechanical table with a manipulator is arranged on one side facing the feeding port of the pipe cutting machine body; the bar feeding mechanism is arranged on one side of the mechanical feeding platform and arranged in parallel with the feeding mechanical platform; wherein the bar feeding mechanism is towards the conveyer belt that the feeding mechanical platform direction extends, just the whole length of feeding mechanical platform be greater than bar material loading structure.

Description

Pipe cutting machine

Technical Field

The invention belongs to the technical field of bar cutting, and particularly relates to a pipe cutting machine.

Background

The automatic pipe cutting machine is designed for meeting the requirements of high-precision fixed-length cutting, and various soft and hard materials such as plastic pipes, rubber pipes, composite pipes, copper pipes, aluminum pipes and the like can be cut at fixed length by replacing a cutter. Conventional cutting machines separate the bars one by transporting the bars transversely, preventing them from stacking. But through this kind of horizontal transportation can increase the holistic area of pipe cutting machine to be unfavorable for the optimization of mill, and reduced the utilization ratio of factory building.

Disclosure of Invention

The invention aims to provide a pipe cutting machine which is simple in structure and suitable for automatic feeding of transverse materials, aiming at the technical problems.

In view of this, the present invention provides a pipe cutting machine, comprising:

the pipe cutting machine comprises a pipe cutting machine body, wherein a feeding port is formed in one side of the pipe cutting machine body;

the feeding mechanical table with a manipulator is arranged on one side facing the feeding port of the pipe cutting machine body;

the bar feeding mechanism is arranged on one side of the mechanical feeding platform and is arranged in parallel with the feeding mechanical platform;

wherein rod feed mechanism towards the conveyer belt that extends to material loading mechanical platform direction, just material loading mechanical platform's whole length be greater than rod material loading structure.

In the technical scheme, the system also comprises an external control cabinet, wherein a controller (PLC), a control circuit and the like are arranged in the control cabinet; the pipe cutting machine cuts the bar material at equal intervals according to the input parameters; feeding in the direction of a feeding mechanical table through a bar feeding mechanism; the feeding mechanical platform is a platform surface with a manipulator, and the manipulator can move close to or away from the feeding mechanical platform, so that a bar on a conveying belt extending towards the feeding mechanical platform by the feeding mechanism is grabbed and conveyed to the pipe cutting machine, and the automatic feeding of the pipe cutting machine is realized; simultaneously because material loading machinery and rod feed mechanism are parallel arrangement each other to shorten the holistic length of rod transfer chain, and then improved the utilization ratio of factory building.

In the above technical solution, further, the bar feeding mechanism includes:

the feeding support frame is arranged on one side of the feeding mechanical table;

the bar lifting assembly is arranged on one side of the feeding support frame, which is far away from the feeding mechanical platform;

the rod material loading subassembly is provided with the rod material loading subassembly on the material loading support frame, and the direction of rod material loading subassembly orientation material loading mechanical platform extends there is the conveyer belt.

In the technical scheme, the feeding support frame has a good supporting effect on the whole bar feeding mechanism; and the bar feeding assembly conveys the bars to the feeding mechanical table, and the feeding lifting assembly feeds the bar feeding assembly.

In the above technical solution, further, the rod lifting mechanism includes:

the lifting support frames are distributed on one side of the feeding support frame at equal intervals;

the lifting support shaft is rotatably arranged on one side of the feeding support frame close to the bar lifting mechanism;

the receiving rollers are arranged on the feeding support frame corresponding to the lifting frame and are positioned on the upper side of the lifting support shaft;

the lifting straps are arranged at the upper ends of the lifting support frames, one ends of the lifting straps are fixed at the upper ends of the lifting support frames and are higher than the bearing roller, and the other ends of the lifting straps are fixedly connected with the lifting support shafts at the lower sides of the bearing roller after bypassing the upper side of the bearing roller;

wherein the retraction of the lifting straps is realized through the lifting support shaft.

In the technical scheme, the lifting support shaft is driven to rotate by a lifting motor, and the lifting motor is controlled by a controller to operate; stacking a plurality of bars on the lifting bandage, so that the lifting bandage is influenced by the gravity of the bars and positioned on the lifting support frame and the feeding support frame bracket; then, the lifting support shaft rotates to wind the lifting binding belt, so that the bar materials piled on the lifting binding belt move upwards and then move to the bar material feeding assembly through the receiving roller; and thereby promote the back shaft and not roll up and promote the lifting band and once can carry out a counter rotation and emit a section of falling and promote the bandage to can guarantee the volume that drops of rod when rolling up promotion is tied next time.

In the above technical solution, further, the bar feeding assembly includes:

the feeding support frame is provided with a plurality of inner conveying frames which are arranged corresponding to the receiving rollers, each inner conveying frame is provided with an inner conveying belt, the inner conveying belts are driven to rotate by an inner transmission shaft, and the inner conveying frames and the receiving rollers are arranged at the same height;

the outer conveying frames are arranged on the feeding support frame and located on one sides of the inner conveying frames, each inner conveying frame is provided with an outer conveying belt, the outer conveying belts are driven to rotate by an outer transmission shaft, the outer conveying belts extend onto the feeding mechanical table, and a blocking piece higher than the outer conveying belts is arranged on one sides, close to the feeding mechanical table, of the outer conveying frames;

the limiting pieces are arranged on one side of each outer conveying frame and limit the bars on the inner conveying frame to move to the outer conveying frame;

and the ejection structure is arranged on the feeding support frame and drives the bar material positioned on the inner conveying belt to be ejected and downwards slide through the limiting piece to the outer conveying belt through the driving structure.

In the technical scheme, the rods are conveyed side by side one by one through the matching of the inner conveying belt and the outer conveying belt, and then the rods are conveyed into the automatic pipe cutting machine through the external transverse conveyor; the arrangement of the limiting pieces can effectively limit the displacement of the bars, then the bars on the inner conveying belt are jacked up through the ejection mechanism and then slide downwards, and the rear ejection mechanism drives the bars to move downwards, so that the outer conveying belt contacts the bars, and the conveying of the outer conveying belt is facilitated; and the separation blade that sets up can prevent that the rod from falling out the outer transport and send the area to can be convenient for snatch of material loading machinery platform.

In the above technical solution, further, the inner conveyer belt and the outer conveyer belt run synchronously, and the inner conveyer belt and the outer conveyer belt form a receiving area which is arranged side by side, the inner transmission shaft and the outer transmission shaft are located on the receiving area, and the outer conveyer belt extends outward from one side of the inner conveyer belt, and the ejection structure ejects the bar material at the position of the receiving area.

In the technical scheme, the inner synchronous belt and the outer synchronous belt can be a transmission chain or a synchronous belt; and the inner support frame and the outer conveying frame are both provided with driving wheels for opening the synchronous belts, and the transmission ratio of the driving wheels on the inner support frame and the outer conveying frame is 1:1; the inner transmission shaft and the outer transmission shaft are synchronously transmitted through a synchronous wheel structure such as a chain wheel and the like by the same motor; thereby facilitating the transportation of the bars.

In the above technical solution, further, the ejection mechanism includes:

the lifting support frame is provided with a plurality of guide rails with sliders arranged at equal intervals, and one support truss is connected with the feeding support frame in a sliding mode through the sliders;

the ejection driving cylinder is provided with a plurality of ejection driving cylinders with driving ends connected with the supporting truss;

and the support truss is provided with a plurality of ejection frames for framing the inner transmission shaft and the outer transmission shaft.

In the technical scheme, the support truss has a good support effect on the whole ejection mechanism; the driving of the ejection driving cylinder can drive the support truss seat to move up and down; the ejection frame is arranged outside the transmission shaft and the outer transmission shaft, and is driven to move up and down through the support truss, so that good effects of jacking and putting down the bars are achieved.

In the above technical solution, further, the ejection frame includes:

the bearing strip is fixedly arranged on the support truss;

the U-shaped frame is fixed on the bearing strip, the opening of the U-shaped frame faces upwards, the inner transmission shaft and the outer transmission shaft are both positioned in the U-shaped frame under a normal state, and the U-shaped frame is positioned at one side of the inner transmission shaft and is higher and the other side of the outer transmission shaft is lower;

the sliding strip is arranged on the U-shaped frame and inclines downwards from one side of the inner transmission shaft to the direction of the outer transmission shaft.

In the technical scheme, the support bar can be arranged to facilitate fixing of the U-shaped frame, the U-shaped frame can be arranged to facilitate jacking of the bars, the sliding bar which is obliquely arranged can facilitate sliding of the bars from the inner transmission belt to the direction of the outer transmission belt, the driving cylinder is ejected afterwards, and the driving cylinder retracts to drive the ejection frame to move downwards, so that the bars can be moved to the outer transmission belt.

In the above technical solution, further, a slot is formed on one side of the U-shaped frame, one side of the sliding strip is rotationally fixed on the slot through a bolt, and the other end of the sliding strip abuts against an end face of the U-shaped frame at a lower side.

In this technical scheme, can improve the structural stability that the sliding strip ann changes through grooved setting, and the tightening of sliding strip accessible bolt or loosen and adjust the sliding strip or follow the trade to the holistic practicality of sliding strip has been improved.

In the technical scheme, further, an arc-shaped receiving section is formed on one side, facing the inner conveying belt, of the limiting sheet; the downward inclination angle of the sliding strip is more than 10 degrees; and a proximity switch is arranged on one side of the limiting sheet.

In the technical scheme, the arrangement of the arc-shaped bearing part can facilitate the blocking of the bars, and the bars positioned on one side of the bearing section are more easily jacked up, so that the blocking of the limiting pieces to the bars is reduced; the downward inclination angle of the sliding bar is more than 10 degrees, so that the bar positioned on the sliding bar can slide downwards conveniently; when proximity switch senses the rod, just can drive ejection frame, and the arrangement of a rod is allowed to the interval difference between ejection frame and the rod to can effectually prevent many rods material loading simultaneously.

In the above technical solution, further, the method further includes: rod feed mechanism still includes:

the bar guiding assembly is arranged at the upper end of the feeding support frame and is arranged towards the direction of the bar feeding assembly, the bar guiding assembly is provided with a plurality of guiding rollers driven by a guiding shaft, and the guiding shaft is driven by a guiding motor to rotate; .

In this technical scheme, be formed with the clearance that supplies a rod to pass through between guide roller and rod material loading subassembly's the conveyer belt, and guide roller's direction of rotation is opposite with the transmission direction of conveyer belt to can dial the rod that piles up and fall, thereby prevent thereby that the rod that piles up from getting into the precision of snatching that the mechanical arm influenced.

The invention has the beneficial effects that:

1. the feeding mechanism and the bar feeding mechanism are arranged in parallel, so that the overall length of the bar conveying line is shortened;

2. the feeding quantity of the bars can be ensured by the intermittent movement of the lifting straps.

Drawings

FIG. 1 is a schematic diagram of a first perspective of the present invention;

FIG. 2 is a schematic diagram of a first perspective of the present invention;

FIG. 3 is a schematic view of a portion of a first perspective of a rod feeding assembly according to the present invention;

FIG. 4 is a schematic diagram of a second perspective view of a portion of the bar feeding assembly of the present invention;

FIG. 5 is a schematic structural view of a spacing piece according to the present invention;

the labels in the figures are: 1-a pipe cutting machine body, 2-a feeding mechanical table, 3-a manipulator, 4-a feeding support frame, 5-a lifting support frame, 6-a lifting support shaft, 7-a receiving roller, 8-an inner conveying frame, 9-an inner transmission shaft, 10-an outer conveying frame, 11-an outer transmission shaft, 12-a baffle plate, 13-a limiting plate, 14-a support truss, 15-an ejection driving cylinder, 16-a receiving roller, 17-a receiving strip, 18-a U-shaped frame, 19-a sliding strip, 20-a proximity switch and 21-a guide roller.

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived from the embodiments in the present application by a person skilled in the art, are within the scope of protection of the present application.

Example one

This embodiment provides a pipe cutting machine, includes:

the pipe cutting machine comprises a pipe cutting machine body 1, wherein a feeding port is formed in one side of the pipe cutting machine body 1;

a feeding mechanical table 2, wherein the feeding mechanical table 2 with a manipulator 3 is arranged on one side facing to a feeding port of the pipe cutting machine body 1;

the bar feeding mechanism is arranged on one side of the mechanical feeding platform and arranged in parallel with the feeding mechanical platform 2;

wherein the rod feeding mechanism is towards the conveyer belt that 2 directions of material loading machinery platform extended, just the whole length of material loading machinery platform 2 be greater than rod material loading structure.

In this embodiment, the system further comprises an external control cabinet, and a controller (PLC), a control circuit and the like are arranged in the control cabinet; the pipe cutting machine cuts the bar material at equal intervals according to the input parameters; feeding the feeding mechanical table 2 through a bar feeding mechanism; the feeding mechanical table 2 is a table top with a manipulator 3, and the manipulator 3 can move close to or away from the feeding mechanical table 2, so that bars on a conveying belt extending towards the feeding mechanical table 2 by a feeding mechanism are grabbed and conveyed to the pipe cutting machine, and the automatic feeding of the cutting machine is realized; simultaneously because material loading machinery and rod feed mechanism are parallel arrangement each other to shorten the holistic length of rod transfer chain, and then improved the utilization ratio of factory building.

Example two

The embodiment provides a pipe cutting machine, which includes the technical features described in the above embodiment.

Rod feed mechanism include:

the feeding support frame 4 is arranged on one side of the feeding mechanical table 2;

the bar lifting assembly is arranged on one side of the feeding support frame 4, which is far away from the feeding mechanical table 2;

the rod material loading subassembly is provided with the rod material loading subassembly on material loading support frame 4, and the direction of rod material loading subassembly orientation material loading mechanical platform 2 extends there is the conveyer belt.

In this embodiment, the feeding support frame 4 has a good supporting effect on the whole bar feeding mechanism; and the bar feeding assembly conveys the bars to the feeding mechanical table 2, and the feeding lifting assembly feeds the bar feeding assembly.

EXAMPLE III

The embodiment provides a pipe cutting machine, which comprises the technical scheme of the embodiment and also has the following technical characteristics.

The rod hoist mechanism include:

the lifting support frames 5 are distributed on one side of the feeding support frame 4 at equal intervals;

the lifting support shaft 6 is rotatably arranged on one side, close to the bar lifting mechanism, of the feeding support frame 4;

the supporting rollers 7 are arranged on the feeding support frame 4 corresponding to the lifting frame, and the supporting rollers 7 are positioned on the upper side of the lifting support shaft 6;

the lifting straps are arranged at the upper ends of the lifting support frames 5, one ends of the lifting straps are fixed at the upper ends of the lifting support frames 5 and are higher than the supporting roller 7, and the other ends of the lifting straps are fixedly connected with a lifting support shaft 6 at the lower side of the supporting roller 7 after passing by from the upper side of the supporting roller 7;

wherein the retraction of the lifting straps is achieved by the lifting support shaft 6.

In this embodiment, the lifting support shaft 6 is rotated by a lifting motor, and the lifting motor is controlled by the controller to operate; stacking a plurality of bars on the lifting straps to enable the lifting straps to be positioned on the supports of the lifting support frame 5 and the feeding support frame 4 under the influence of the gravity of the bars; then, the lifting binding bands are wound through the rotation of the lifting support shaft 6, so that the bars piled on the lifting binding bands move upwards and then move to the bar feeding assembly through the receiving roller 7; and thereby promote back shaft 6 and not roll up and promote the lifting band and once can carry out a counter rotation and emit a section of falling and promote the bandage to can guarantee the volume that drops of rod when rolling up next time promotes the bandage.

Example four

The embodiment provides a pipe cutting machine, which comprises the technical scheme of the embodiment and also has the following technical characteristics. The rod material feeding assembly comprises:

the feeding support frame 4 is provided with a plurality of inner conveying frames 8 which correspond to the receiving rollers 7, each inner conveying frame 8 is provided with an inner conveying belt, the inner conveying belts are driven by an inner transmission shaft 9 to rotate, and the inner conveying frames 8 and the receiving rollers 7 are arranged at the same height;

the outer conveying frame 10 is arranged on the feeding support frame 4 and located on one side of the inner conveying frame 8, each inner conveying frame 8 is provided with an outer conveying belt, the outer conveying belts are driven to rotate by an outer transmission shaft 11 and extend onto the feeding mechanical table 2, and a blocking piece 12 higher than the outer conveying belts is arranged on one side, close to the feeding mechanical table 2, of the outer conveying frame 10;

the limiting pieces 13 are arranged on one side of each outer conveying frame 10, and the limiting pieces 13 limit the bars on the inner conveying frame 8 to move to the outer conveying frames 10;

and the ejection structure is arranged on the feeding support frame 4, and is driven by the driving structure to eject the bar material on the inner conveying belt and slide downwards to pass through the limiting piece 13 and then onto the outer conveying belt.

In the embodiment, the bars are conveyed side by matching the inner conveying belt and the outer conveying belt, and then the bars are conveyed to the automatic pipe cutting machine by the external transverse conveyor; the limiting piece 13 can effectively limit the displacement of the bars, the bars on the inner conveying belt are jacked up through the ejection mechanism and then slide downwards, and the rear ejection mechanism drives the bars to move downwards, so that the outer conveying belt contacts the bars, and the conveying of the outer conveying belt is facilitated; the blocking piece 12 can prevent the bars from falling out of the outer conveying belt, so that the grabbing of the feeding mechanical platform 2 can be facilitated.

EXAMPLE five

The embodiment provides a pipe cutting machine, which comprises the technical scheme of the embodiment and also has the following technical characteristics. The inner conveying belt and the outer conveying belt run synchronously, a bearing area is formed by the inner conveying belt and the outer conveying belt in parallel, the inner transmission shaft 9 and the outer transmission shaft 11 are located on the bearing area, the outer conveying belt extends outwards from one side of the inner conveying belt, and the bar is jacked up by the jacking structure at the position of the bearing area.

In this embodiment, the inner synchronous belt and the outer synchronous belt may be a transmission chain or a synchronous belt; and the inner supporting frame and the outer conveying frame 10 are both provided with driving wheels for opening the synchronous belt, and the transmission ratio of the driving wheels on the inner supporting frame and the outer conveying frame 10 is 1:1; the inner transmission shaft 9 and the outer transmission shaft 11 are synchronously transmitted through a synchronous wheel structure such as a chain wheel and the like by the same motor; thereby facilitating the transportation of the bars.

EXAMPLE six

The embodiment provides a pipe cutting machine, which includes the technical features described in the above embodiment. The ejection mechanism comprises:

the lifting support frame 5 is provided with a plurality of guide rails with sliders arranged at equal intervals, and one support truss 14 is connected with the feeding support frame 4 in a sliding manner through the sliders;

the ejection driving cylinder 15 is arranged, and a plurality of ejection driving cylinders 15 with driving ends connected with the supporting truss 14 are arranged on the feeding supporting frame 4;

and the support truss 14 is provided with a plurality of ejection frames for framing the inner transmission shaft 9 and the outer transmission shaft 11.

In the present embodiment, the supporting truss 14 provides a good supporting effect for the entire ejection mechanism; the driving of the ejection driving cylinder 15 can drive the support truss 14 to move up and down; the ejection frame is arranged outside the transmission shaft and the outer transmission shaft 11, and the ejection frame is driven to move up and down through the support truss 14, so that good effects of ejecting and putting down the bar are achieved.

EXAMPLE seven

The embodiment provides a pipe cutting machine, which comprises the technical scheme of the embodiment and also has the following technical characteristics. The ejection frame comprises:

the bearing strip 17, the bearing strip 17 is fixedly arranged on the supporting truss 14;

the U-shaped frame 18 is fixed on the bearing strip 17, the opening of the U-shaped frame 18 faces upwards, the inner transmission shaft 9 and the outer transmission shaft 11 are both located in the U-shaped frame 18 under a normal state, and the U-shaped frame 18 is located on one side of the inner transmission shaft 9 and is high and located on one side of the outer transmission shaft 11 and is low;

and the sliding strip 19 is arranged on the U-shaped frame 18, and the sliding strip 19 inclines downwards from one side of the inner transmission shaft 9 to the direction of the outer transmission shaft 11.

In this embodiment, the receiving bar 17 is disposed to facilitate the fixing of the U-shaped frame 18, the U-shaped frame 18 is disposed to facilitate the lifting of the rod, and the sliding bar 19 is disposed to facilitate the sliding of the rod from the inner transmission belt to the direction of the outer transmission belt, and then the driving cylinder 15 is ejected, and the rod retracts to drive the ejection frame to move downwards, so that the rod moves to the outer transmission belt.

Example eight

The embodiment provides a pipe cutting machine, which includes the technical features described in the above embodiment. A groove is formed on one high side of the U-shaped frame 18, one side of the sliding strip 19 is rotationally fixed on the groove through a bolt, and the other end of the sliding strip 19 abuts against the end face of one low side of the U-shaped frame 18.

In this embodiment, the structural stability of the slide bar 19 run can be improved by the arrangement of the slot, and the slide bar 19 can be adjusted or replaced by screwing or loosening the bolt, so that the overall practicability of the slide bar 19 is improved.

Example nine

The embodiment provides a pipe cutting machine, which includes the technical features described in the above embodiment. An arc-shaped bearing section is formed on one side of the limiting sheet 13 facing the inner conveying belt; the downward inclination angle of the sliding strip 19 is more than 10 degrees; a proximity switch 20 is arranged on one side of the limiting sheet 13.

In the embodiment, the arrangement of the arc-shaped receiving part can facilitate blocking the bars, and the bars on one side of the receiving section are more easily jacked up, so that the blocking of the limiting sheet 13 to the bars is reduced; the downward inclination angle of the sliding bar 19 is more than 10 degrees so as to facilitate the downward sliding of the bar on the sliding bar 19; when the proximity switch 20 senses the bars, the ejection frame is driven, and the distance difference between the ejection frame and the bars allows the arrangement of one bar, so that the simultaneous feeding of a plurality of bars can be effectively prevented.

EXAMPLE ten

The embodiment provides a pipe cutting machine, which comprises the technical scheme of the embodiment and also has the following technical characteristics. Further comprising: rod feed mechanism still includes:

the bar guiding assembly is arranged at the upper end of the feeding support frame 4 and is arranged towards the direction of the bar feeding assembly, the bar guiding assembly is provided with a plurality of guiding rollers 21 driven by a guiding shaft, and the guiding shaft is driven by a guiding motor to rotate; .

In this embodiment, be formed with the clearance that supplies a rod to pass through between guide roller 21 and the conveyer belt of rod material loading subassembly, and guide roller 21's direction of rotation is opposite with the transmission direction of conveyer belt to can dial the rod that piles up and fall, thereby prevent that the rod that piles up from getting into the precision of snatching of material loading machinery platform 2 influence manipulator 3.

While the embodiments of the present application have been described in connection with the drawings, the embodiments and features of the embodiments of the present application can be combined with each other without conflict and the present application is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present application as claimed.

Claims

1. A pipe cutter, comprising:

the pipe cutting machine comprises a pipe cutting machine body (1), wherein a feeding port is formed in one side of the pipe cutting machine body (1);

a feeding mechanical table (2), wherein the feeding mechanical table (2) with a manipulator (3) is arranged on one side facing a feeding opening of the pipe cutting machine body (1);

the bar feeding mechanism is arranged on one side of the mechanical feeding table and is arranged in parallel with the feeding mechanical table (2);

wherein the bar feeding mechanism extends towards the direction of the feeding mechanical table (2), and the whole length of the feeding mechanical table (2) is greater than that of the bar feeding structure.

2. The pipe cutting machine of claim 1, wherein said bar feed mechanism comprises:

the feeding support frame (4), the feeding support frame (4) is arranged on one side of the feeding mechanical table (2);

the bar lifting assembly is arranged on one side, away from the feeding mechanical table (2), of the feeding support frame (4);

the bar feeding assembly is arranged on the feeding support frame (4), and a conveying belt extends towards the direction of the feeding mechanical table (2).

3. The pipe cutting machine of claim 2, wherein the bar lifting mechanism comprises:

the lifting support frames (5) are distributed on one side of the feeding support frame (4) at equal intervals;

a lifting support shaft (6), wherein the rotatable lifting support shaft (6) is arranged on one side of the feeding support frame (4) close to the bar lifting mechanism;

the supporting rollers (16) are arranged on the feeding support frame (4) corresponding to the lifting support frame, and the supporting rollers (16) are positioned on the upper side of the lifting support shaft (6);

the lifting straps (7) are arranged at the upper ends of the lifting support frames (5), one ends of the lifting straps (7) are fixed at the upper ends of the lifting support frames (5), and the other ends of the lifting straps (7) are fixedly connected with the lifting support shafts (6) on the lower sides of the bearing rollers (16) after passing by from the upper sides of the bearing rollers (16);

wherein the lifting binding band (7) is folded and unfolded through the lifting support shaft (6).

4. A rod feeding assembly according to claim 3, wherein said rod feeding assembly comprises:

the feeding support frame (4) is provided with a plurality of inner conveying frames (8) which are arranged corresponding to the receiving rollers (16), each inner conveying frame (8) is provided with an inner conveying belt, the inner conveying belts are driven to rotate by an inner transmission shaft (9), and the inner conveying frames (8) and the receiving rollers (16) are arranged at the same height;

the outer conveying frame (10) is arranged on the feeding support frame (4) and located on one side of the inner conveying frame (8), each inner conveying frame (8) is provided with an outer conveying belt, the outer conveying belts are driven to rotate by an outer transmission shaft (11), the outer conveying belts extend onto the feeding mechanical table (2), and a blocking piece (12) higher than the outer conveying belts is arranged on one side, close to the feeding mechanical table (2), of each outer conveying frame (10);

the limiting pieces (13) are arranged on one side of each outer conveying frame (10), and the limiting pieces (13) limit the bars on the inner conveying frame (8) to move to the outer conveying frames (10);

the ejection structure is arranged on the feeding support frame (4), and the bar material positioned on the inner conveying belt is ejected and slides downwards to pass through the limiting piece (13) under the driving of the driving structure to be conveyed to the outer conveying belt.

5. The pipe cutting machine according to claim 4, characterized in that the inner conveyor belt and the outer conveyor belt run synchronously and form a receiving area which are arranged side by side, the inner transmission shaft (9) and the outer transmission shaft (11) are located on the receiving area, the outer conveyor belt extends outwards from one side of the inner conveyor belt, and the ejection structure ejects the bars at the position of the receiving area.

6. The pipe cutter of claim 5, wherein the ejection mechanism comprises:

the lifting support frame (5) is provided with a plurality of guide rails with sliders arranged at equal intervals, and one support truss (14) is connected with the feeding support frame in a sliding mode through the sliders;

the ejection driving cylinder (15), a plurality of ejection driving cylinders (15) with driving ends connected with the supporting truss (14) are arranged on the feeding supporting frame;

and the support truss (14) is provided with a plurality of ejection frames for framing the inner transmission shaft (9) and the outer transmission shaft (11).

7. The pipe cutter of claim 6, wherein the ejector frame comprises:

the bearing strip (17), the bearing strip (17) is fixedly arranged on the supporting truss (14);

the U-shaped frame (18) is fixed on the bearing strip (17), the opening of the U-shaped frame is upward, the inner transmission shaft (9) and the outer transmission shaft (11) are both positioned in the U-shaped frame (18) under a normal state, and the U-shaped frame (18) is positioned at one side of the inner transmission shaft (9) and is high and one side of the outer transmission shaft (11) is low;

the sliding strip (19) is arranged on the U-shaped frame (18), and the sliding strip (19) inclines downwards from one side of the inner transmission shaft (9) to the direction of the outer transmission shaft (11).

8. A pipe cutting machine as claimed in claim 7, characterized in that the U-shaped frame (18) is formed with a slot on the high side, one side of the slide bar (19) is rotatably fixed in the slot by means of a bolt, and the other end of the slide bar (19) abuts against the end face of the U-shaped frame (18) on the low side.

9. The pipe cutting machine as claimed in claim 8, characterized in that an arc-shaped receiving section is formed on the side of the limiting piece (13) facing the inner conveyor belt; the downward inclination angle of the sliding strip (19) is more than 10 degrees; and a proximity switch (20) is arranged on one side of the limiting sheet (13).

10. The pipe cutting machine of claim 2, wherein the bar feed mechanism further comprises:

the rod guide assembly is arranged at the upper end of the feeding support frame (4) and is arranged towards the direction of the rod feeding assembly, and the rod guide assembly is provided with a plurality of guide rollers (21) driven by a guide shaft.