CN210615293U

CN210615293U - Multi-chuck zero-tailing feeding and discharging pipe cutting production line

Info

Publication number: CN210615293U
Application number: CN201921557990.3U
Authority: CN
Inventors: 蒋习锋; 王明利; 岳念举
Original assignee: Jinan GWeike Science & Technology Co ltd
Current assignee: Jinan Jinweike Laser Technology Co.,Ltd.
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-05-26
Anticipated expiration: 2029-09-17

Abstract

The utility model provides a multi-chuck zero-tailing feeding and discharging pipe cutting production line, which belongs to the technical field of pipe cutting, wherein a rack is provided with parallel navigation rails arranged along the length direction of the rack, the parallel navigation rails are at least provided with a front chuck, a middle chuck and a rear chuck, and a cutting mechanism is configured on a cutting portal frame; the machine frame is provided with a lifting follow-up centering supporting mechanism, a wire end follow-up blanking mechanism and a wire end clamping mechanism. The utility model discloses a lift follow-up and centering are accurate, the change of the follow-up tubular product action of effective reasonable cooperation in tubular product cutting process. The utility model discloses a slope is unloaded and is favorable to making the direct tilting of tubular product follow cutting production line cutting back independently roll downwards and unload, convenient and fast, easily control. The utility model discloses an end-of-line clamping mechanism realizes that the tongs snatchs drawing close of space to central tubular product to carry out strong the snatching to central department tubular product. The utility model discloses a compound action is swift effective, walks to position accurately, makes things convenient for electrified accurate control.

Description

Multi-chuck zero-tailing feeding and discharging pipe cutting production line

Technical Field

The utility model belongs to the technical field of the tubular product cutting technique and specifically relates to a unloading tubular product cutting production line on zero tails of many chucks.

Background

Generally, the pipe cutting equipment in the prior art mostly comprises at least three chucks which can move left and right and rotate synchronously, and when the pipe is normally cut, the chucks grab the pipe to advance and rotate, and the cutting head is used for cutting the pipe. The traditional pipe cutting equipment can generate tails due to different processes due to the arrangement of the chuck, and the tail pipe generates waste of raw materials. Patent document No. CN109175730A, entitled: the full-moving multi-chuck cutting device and method can reduce tailings to the maximum extent, save cost, but cannot achieve zero tailings. And when the multi-chuck pipe cutting equipment is used for feeding pipes, the pipes with different pipe diameters are centered, and the multi-chuck self-centering clamp cannot well ensure that the full-length pipes are on the central axis. The wire end also lacks post-processing equipment for the cut tubing.

Disclosure of Invention

The technical task of the utility model is to solve the not enough of prior art, provide a unloading tubular product cutting production line on zero tails of many chucks.

The technical scheme of the utility model is realized according to the following mode, the utility model discloses a unloading tubular product cutting production line on zero tails of many chucks, including the frame, be provided with the parallel air track that arranges along frame length direction in the frame, be provided with front chuck, well chuck and back chuck on the parallel air track at least to and cut the portal frame, dispose cutting mechanism on the cutting portal frame; the machine frame is provided with a lifting follow-up centering supporting mechanism, a wire end follow-up blanking mechanism and a wire end clamping mechanism.

In particular to a method for preparing a high-purity polyethylene,

the front chuck, the middle chuck, the rear chuck and the cutting portal frame are respectively arranged on the air track through independent air frames and are in sliding connection with the air track.

The front chuck, the middle chuck, the rear chuck and the cutting gantry are respectively provided with an independent traveling mechanism which accurately travels back and forth along the air track.

The lifting follow-up centering support mechanism, the wire end follow-up blanking mechanism and the wire end clamping mechanism are respectively provided with an independent electric power mechanism.

The machine frame is provided with a lifting follow-up centering support mechanism formed by a flat rotating pipe edge rolling double roller for clamping the pipe centering with two-stage lifting action, a line end follow-up blanking mechanism for discharging the pipe in the radial side direction and a line end clamping mechanism for clamping the pipe by four-claw double linkage.

The feeding section of the frame is provided with a lifting follow-up centering support mechanism fixing unit, the lifting follow-up centering support mechanism fixing units are arranged below the flight path and are sequentially arranged along the flight path direction, at least two groups of lifting follow-up centering support mechanisms are arranged in the sequentially arranged lifting follow-up centering support mechanism fixing units,

a lifting follow-up centering support mechanism of a pipe cutting production line structurally comprises a fixed base, a first-level lifting seat and a second-level lifting frame,

the bottom of the fixed base is fixedly connected with a vertically arranged primary lifter, a lifting push rod of the primary lifter penetrates out of the fixed base from the lower part of the fixed base, the top end of the lifting push rod is fixedly connected with a primary lifting seat, a horizontally arranged secondary lifter and an axial output driving gear of the secondary lifter are fixedly arranged on the primary lifting seat,

the side wall of the first-level lifting seat is fixedly connected with a sliding seat component,

a second-stage lifting frame is arranged at the side of the first-stage lifting seat, a sliding rail component in the vertical direction is arranged on the second-stage lifting frame,

the sliding seat component is connected with the sliding rail component in a sliding fit way,

a rack in the vertical direction is fixedly connected to the secondary lifting frame, and the rack is parallel to a slide rail of the slide rail assembly;

a driving gear output by the secondary elevator is meshed with the rack;

a lifting push rod of the primary lifter pushes and pulls the primary lifting seat to realize primary lifting action; the secondary lifting machine drives the driving gear to rotate positively and negatively, so that the rack moves up and down relative to the driving gear, and the rack drives the whole secondary lifting frame to realize secondary lifting action through sliding fit of the sliding seat assembly and the sliding rail assembly;

the top end of the secondary lifting frame is provided with a centering support assembly;

the centering support component is provided with a central turntable which is arranged in the horizontal direction, a horizontal centering support disk is coaxially arranged in the axial direction of the central turntable, the centering support disk is coaxially matched with the central turntable in a driving way,

two ends of the centering support plate in the length direction are respectively provided with a vertical tube edge rolling roller; the roll shafts of the two tube edge rolling rolls are fixedly connected to the centering support disc; the roll body of each tube edge rolling roll freely rotates relative to the roll shaft where the roll body is located;

a horizontal rolling roller in the horizontal direction is arranged on one side edge of the centering support plate between the two pipe edge rolling rollers; the roll shaft of the horizontal rolling roll is fixedly connected to the side edge of the centering support plate where the roll shaft is located, and the roll body of the horizontal rolling roll freely rotates relative to the roll shaft;

the two tube edge rolling rollers are respectively vertical to the horizontal rolling roller;

the height of the upper roll edge of the horizontal rolling roll is higher than the upper surface of the centering support disk.

The bottom fixedly connected with of one-level lift seat has the vertical optical axis guide post group that sets up, and every two liang of optical axis guide posts of optical axis guide post group are parallel to each other, and each optical axis guide post of optical axis guide post group extends downwards and pierces into the guide holder hole on the unable adjustment base, and each optical axis guide post passes the guide holder hole and extends to the unable adjustment base below, and the length of each optical axis guide post is greater than the length of the lift stroke of the lift push rod of one-level lift.

The lifting stroke of the lifting push rod of the primary lifter is mutually parallel to the sliding lifting stroke of the sliding seat component of the secondary lifter and the sliding rail component of the secondary lifter, and the lifting stroke and the sliding stroke are both arranged in the vertical direction.

The first-stage lifter adopts an electric cylinder, an air cylinder or a hydraulic cylinder which can work in a self-locking forward and reverse direction;

the second-stage lifter adopts a self-locking motor working in forward and reverse directions, and an output shaft of the motor is coaxially and fixedly connected with a driving gear.

The top fixedly connected with gyration cylinder fixed plate of second grade crane, fixedly connected with gyration cylinder on the gyration cylinder fixed plate, gyration cylinder drive connection center carousel, center carousel drive centering supporting disk.

The rotary cylinder is provided with an angle sensor.

Fixedly connected with second grade lifter plate on the second grade crane, second grade lifter plate fixed connection is on slide rail set spare.

The second-level lifter drives the speed reducer, and the speed reducer is connected with the driving gear in a driving mode.

The projection of the midpoint of a horizontal connecting line between the two tube edge rolling rollers on the central turntable falls on the rotating axis center of the central turntable.

The two tube edge rolling rollers have the same size, shape and specification.

The wire end section of the frame is provided with a wire end follow-up blanking mechanism,

the tail follow-up blanking mechanism of the pipe cutting production line structurally comprises an upstream fixed seat and a downstream fixed seat,

the upstream end surface of the upstream fixed seat is fixedly connected with an upstream fixed sliding block;

an upstream shaft seat is arranged on the seat body of the upstream fixed seat;

the downstream end surface of the downstream fixed seat is fixedly connected with a downstream fixed sliding block;

a downstream shaft seat is arranged on the seat body of the downstream fixed seat;

the inner side plate surface of the upstream follow-up lifting plate is fixedly connected with an upstream guide rail and an upstream rack, the upstream guide rail and the upstream rack are parallel to each other and are vertically arranged, and the upstream guide rail is in sliding fit with the upstream fixed sliding block;

the downstream guide rail and the downstream rack are parallel and vertically arranged, and the downstream guide rail is in sliding fit with the downstream fixed sliding block;

a transmission shaft is connected between the upstream shaft seat and the downstream shaft seat in a penetrating manner, and the transmission shaft is horizontally arranged;

the upstream end of the transmission shaft is coaxially and fixedly connected with an upstream gear, and the downstream end of the transmission shaft is coaxially and fixedly connected with a downstream gear;

the upstream gear is meshed with the upstream rack;

the downstream gear is meshed with the downstream rack;

the upstream end face of the upstream fixing seat is fixedly connected with a follow-up motor seat, a follow-up motor is fixedly arranged on the follow-up motor seat, a shaft of the follow-up motor outputs a driving gear, and the driving gear is meshed with an upstream gear;

the servo motor drives the driving gear to rotate to drive the transmission shaft to rotate, the transmission shaft rotates, and the upstream gear and the downstream gear synchronously rotate at the same time, so that the upstream rack and the downstream rack are synchronously driven to move to drive the upstream follow-up lifting plate and the downstream follow-up lifting plate to move up and down.

The front edge of the outer side plate surface of the upstream follow-up lifting plate is fixedly connected with an upstream air cylinder hinge seat, an upstream air cylinder is hinged on the upstream air cylinder hinge seat, and the upstream air cylinder is vertically arranged;

the front edge of the outer side plate surface of the downstream follow-up lifting plate is fixedly connected with a downstream air cylinder hinged seat, a downstream air cylinder is hinged to the downstream air cylinder hinged seat, and the downstream air cylinder is vertically arranged;

the top end of an upstream push-pull rod of the upstream cylinder, the top end of a downstream push-pull rod of the downstream cylinder, the top end of the rear edge of the upstream follow-up lifting plate and the top end of the rear edge of the downstream follow-up lifting plate are respectively provided with a discharging support plate bottom hinged support;

the hinge rotation direction of the hinge seats at the bottoms of the four discharging supporting plates is consistent with the hinge rotation direction of the hinge seats of the upstream air cylinder and the hinge seats of the downstream air cylinder;

the bottom hinged supports of the four unloading supporting plates are connected with the bottom surface of the unloading supporting plate together;

the upstream end of the discharging supporting plate extends towards the upstream direction, the bottom surface of the discharging supporting plate of the extending part is provided with an inclined lifting plate hinged support, an inclined lifting cylinder is hinged on the inclined lifting plate hinged support, an inclined lifting push pull rod of the inclined lifting cylinder faces towards the upstream direction,

the upstream end of the lifting and inclined push-pull rod is hinged on an optical axis, the two ends of the optical axis are respectively hinged on the short side hinge holes of the two right-angle hinge seats,

the long-side hinge holes of the two right-angle hinge seats are hinged with the downstream frame of the inclined lifting plate together;

a concave platform is arranged at the downstream edge of the inclined lifting plate,

the plate surface at the upstream end of the unloading supporting plate is provided with an inclined ascending plate matching opening;

the inclined lifting plate is matched with the inclined lifting plate matching opening of the discharging supporting plate, and the plate surface of the inclined lifting plate sinks relative to the plate surface of the discharging supporting plate;

the concave platform is matched with the blind end of the lifting inclined plate of the unloading supporting plate and the opening to be matched and fastened.

The plate surface of the upstream follow-up lifting plate is parallel to the upstream end surface of the upstream fixed seat;

the plate surface of the downstream follow-up lifting plate is parallel to the downstream end surface of the downstream fixed seat.

The upstream cylinder and the downstream cylinder are arranged in parallel.

The concave platform is inserted into the bottom surface of the ascending sloping plate matching opening.

The follow-up motor is powered and driven by the power unit.

The upstream cylinder, the downstream cylinder and the inclined cylinder are driven by power supply of the electric power unit.

The discharging support plate is a rectangular discharging support plate, and the length span direction of the rectangle is consistent with the span direction between the upstream fixed seat and the downstream fixed seat.

The inclined lifting plate is a rectangular inclined lifting plate, and the width span of the rectangular inclined lifting plate is smaller than that of the rectangular unloading supporting plate.

The elevation plate is disposed at an upstream end portion of the discharge support plate.

The matching surfaces of the bottom hinged support of the four discharging supporting plates and the hinged supporting plates are arranged on the same plane, the discharging supporting plate is arranged at the position of an upper top point of the four discharging supporting plates, which are overturned along the bottom hinged support of the four discharging supporting plates, and the surface and the horizontal plane of the discharging supporting plate are parallel.

A wire tail clamping mechanism is arranged on the rack at the wire tail end;

the wire end clamping mechanism of the pipe cutting production line structurally comprises a wire end rack cantilever and a clamping box body,

a cantilever fixing seat is fixedly connected on a cantilever of the wire end machine frame,

a clamping mechanism lifter is arranged on the cantilever fixed seat,

the clamping mechanism lifter is fixedly arranged above the cantilever fixing seat, a lifting rod of the clamping mechanism lifter downwards penetrates through the cantilever fixing seat, and the lower end of the lifting rod is fixedly connected to the top box wall of the clamping box body;

a clamping actuating mechanism is arranged in the clamping box body;

an intermediate fixing plate is fixedly connected between the front box wall and the rear box wall of the clamping box body, and an inner cavity of the clamping box body is divided into an upper cavity and a lower cavity by the intermediate fixing plate;

the top parts of the front box wall and the rear box wall of the clamping box body are respectively provided with a corresponding front wall upper slotted hole and a corresponding rear wall upper slotted hole, the upper linkage plate is arranged at the top part of the inner cavity of the clamping box body, the front edge and the rear edge of the upper linkage plate respectively extend out of the front wall upper slotted hole and the rear wall upper slotted hole,

the front edge of the extending part of the upper linkage plate is fixedly connected with an upper front gripper which is arranged downwards,

the rear edge of the extending part of the upper linkage plate is fixedly connected with an upper rear gripper which is arranged in a downward direction;

the upper surface of the middle fixing plate is fixedly provided with an upper front guide rail and an upper rear guide rail which are parallel to each other,

the lower surface of the middle fixing plate is fixedly provided with a lower front guide rail and a lower rear guide rail which are parallel to each other;

the upper surface of the middle fixed plate is fixedly connected with a front telescopic push-pull cylinder and a rear telescopic push-pull cylinder which are parallel to the upper front guide rail,

piston rods of the front telescopic push-pull cylinder and the rear telescopic push-pull cylinder are respectively fixedly connected with the upper linkage plate in the same direction;

the lower surface of the upper linkage plate is fixedly connected with an upper front slide block and an upper rear slide block,

the upper front sliding block is in sliding fit with the upper front guide rail;

the upper rear slide block is in sliding fit with the upper rear guide rail;

the upper linkage plate is fixedly connected with an upper rack, and the direction of the upper rack is parallel to the direction of the front telescopic push-pull cylinder;

a duplicate gear shaft penetrating through the middle fixing plate is arranged in the center of the middle fixing plate and is vertically arranged;

the upper rack is meshed with the upper gear of the duplex gear shaft;

a lower linkage plate is arranged at the bottom of a lower cavity of the clamping box body, and a bottom wall front slotted hole and a bottom wall rear slotted hole which correspond to each other are respectively formed in the bottom box wall of the clamping box body below the front edge and the rear edge of the lower linkage plate;

the front edge of the lower linkage plate is fixedly connected with a lower front gripper arranged in a downward direction; the lower front hand grip penetrates out of the front slotted hole of the bottom wall downwards;

the rear edge of the lower linkage plate is fixedly connected with a lower rear gripper which is arranged downwards; the lower rear hand grip penetrates out of the rear slotted hole of the bottom wall downwards;

the lower linkage plate is fixedly connected with a lower rack;

the lower gear of the duplicate gear shaft is meshed with the lower rack;

the upper surface of the lower linkage plate is respectively and fixedly connected with a lower preposed sliding block and a lower postpositive sliding block,

the lower front sliding block is in sliding fit with the lower front guide rail of the middle fixed plate;

the lower rear slide block is in sliding fit with the lower rear guide rail of the middle fixing plate.

Any one of the clamping mechanism lifter, the front telescopic push-pull cylinder and the rear telescopic push-pull cylinder adopts an electric cylinder, an air cylinder or a hydraulic cylinder which can work in a self-locking forward and reverse mode.

The top surface of the clamping box body is fixedly connected with an optical axis guide column group, and each optical axis guide column which is parallel to each other in the optical axis guide column group penetrates out of a guide hole of a guide column seat on the cantilever fixing seat from bottom to top;

the length of each optical axis guide post is greater than the length of the lifting stroke of the lifting rod of the clamping mechanism lifter.

The upper front gripper and the upper rear gripper are the same in size and shape and are respectively provided with bending parts in the same direction;

the lower front gripper and the lower rear gripper are the same in size and shape and are respectively provided with bending parts in the same direction;

and a pipe grabbing space is formed between the bending parts of the upper front gripper and the upper rear gripper and the bending parts of the lower front gripper and the lower rear gripper.

The slotted hole on the front wall and the slotted hole on the rear wall are parallel to each other;

the upper front guide rail and the lower front guide rail are parallel to each other;

the front slotted hole and the rear slotted hole of the bottom wall are parallel to each other;

the upper rack and the lower rack are parallel to each other;

the upper linkage plate and the lower linkage plate are parallel to each other;

the duplex gear shaft is vertical to the middle fixed plate, and the middle fixed plate is respectively parallel to the upper linkage plate and the lower linkage plate.

The guide hole of the guide post seat is provided with a linear righting bearing for the optical axis guide post to freely slide and stretch.

Compared with the prior art, the utility model produced beneficial effect is:

the utility model discloses a multi-chuck zero-tailing feeding and discharging pipe cutting production line, before feeding, the front clamp and the middle clamp move to the front of the gantry, and the rear clamp moves to the last;

after the pipe is fed, the pipe is centered and the centers of the pipe and the chuck are completed by the lifting follow-up centering support;

the rear clamp moves forwards to clamp the pipe and then continuously moves to enable the front section of the pipe to approach the gantry, the rear clamp stops, and the lifting close to the rear clamp in the process follows the lifting follow-up centering support to descend.

The middle clamp moves backwards to the middle position of the pipe, the front clamp moves backwards to clamp the pipe, the pipe at the front section is enabled to leave a processing size, the front clamp stops moving backwards, and the lifting of the front clamp close to the middle clamp follows the lifting of the middle clamp to descend the centering support;

and after the lifting follow-up centering support completely descends, cutting is started, the follow-up blanking device is lifted, and the follow-up cutting and blanking of the pipe are completed.

Cutting the final tailings, descending the follow-up blanking device, and moving the front card and the middle card forwards;

after cutting, the rear clamp moves to the end, the clamping device descends to clamp a tailing pipe, the middle clamp and the front clamp move backwards to enable the tail end of the pipe to be completely leaked outside the chuck, the clamping device ascends to enable the pipe to ascend, meanwhile, the follow-up blanking device ascends at an angle, the clamping device loosens the gripper to enable the pipe to roll down along the angle of the follow-up blanking device, and blanking is completed.

The utility model discloses a tubular product cutting production line's lift follow-up centering supporting mechanism can match the tubular product of various different specification pipe diameters, need not to park and change spare part, also need not to park and rectify, and it is convenient to overhaul, conveniently maintains, can effectual cooperation operation in tubular product cutting process, and the fault rate is low, effectively guarantees the smooth operation of production line.

The utility model discloses a lift follow-up and centering are accurate, the change of the follow-up tubular product action of effective reasonable cooperation in tubular product cutting process.

The pipe is clamped and fixed on a pipe cutting production line through the front chuck, the middle chuck and the rear chuck, the pipe is horizontally arranged, and the pipe wall of the pipe is horizontally laid on the centering support plate.

On whole tubular product cutting production line, the rotatory axle center of central carousel sets up under the tubular product axis. The central turntable rotates, the distance between the two tube edge rolling rollers relative to the central axis of the tube changes, and the two tube edge rolling rollers rotate until the roller edges of the two tube edge rolling rollers abut against the tube wall of the tube, so that the tube is centered and adjusted in the horizontal direction; in addition, the first-level lifting and the second-level lifting independently act or cooperate to enable the pipe on the centering support disc to ascend or descend so as to achieve centering adjustment in the height direction.

The centering adjustment in the horizontal direction and the centering adjustment in the height direction are performed in a synergistic effect, so that a centered pipe can be obtained, the centering state of the pipe on a pipe cutting production line can be kept, and the cutting is facilitated.

The rotation of the two tube edge rolling rollers can adapt to the tubes with different tube diameter specifications, the tubes with different tube diameters are clamped by utilizing the rotation of the two tube edge rolling rollers relative to the central axis of the tube, the clamp does not need to be replaced, and the device has multiple purposes; and the two pipe edge rolling rollers can also not obstruct the axial movement of the pipe in the process of centering and clamping, and the roller bodies of the two pipe edge rolling rollers can roll with the pipe wall of the pipe without clearance, so that the axial movement of the pipe under the action of the chuck is facilitated, and the pipe cannot be locked.

The tail follow-up blanking mechanism of the pipe cutting production line of the utility model synchronously drives the unloading support plate to move up and down by utilizing the upstream follow-up lifting plate and the downstream follow-up lifting plate, and synchronously drives the overturning, tilting and unloading of the unloading support plate by utilizing the upstream cylinder and the downstream cylinder on the upstream follow-up lifting plate and the downstream follow-up lifting plate; the pipe cutting machine is favorable for enabling the discharging support plate to be matched with the height of the pipe, and on the other hand, the inclined discharging is favorable for enabling the pipe to be directly inclined and automatically rolled downwards for discharging after being cut from a cutting production line, and the pipe cutting machine is convenient, quick and easy to control.

The inclined lifting plate is arranged at the upstream end of the unloading supporting plate and is independently controlled by an inclined lifting cylinder at the bottom of the unloading supporting plate, so that the inclined lifting plate can be independently operated under the static or overturning state of the unloading supporting plate, and the inclined lifting cylinder lifts the inclined lifting plate to obtain the elevation overturning of the inclined lifting plate. Elevation lifting of the lifting inclined plate can sense the distance between the discharging support plate and the lower edge of the cut pipe, lifting action strokes of the upstream cylinder and the downstream cylinder are calculated and controlled in an auxiliary mode, the discharging support plate is lifted to be attached to the lower edge of the cut pipe, the cut pipe is stabilized, and the discharging support plate is favorable for discharging the cut pipe in an inclined mode.

The utility model discloses a tubular product cutting production line end of line clamping mechanism utilizes the linkage board of the superposition to drive the hand grip before the superposition, hand grip behind the superposition to move to the center synchronously at the same time; the lower linkage plate is used for simultaneously driving the lower front gripper and the lower rear gripper to synchronously move towards the center; the upper gear and the lower gear of the dual gear shaft are respectively meshed with and drive the upper rack and the lower rack to drive the upper linkage plate and the lower linkage plate to perform composite movement in opposite or opposite directions to slide, so that the upper front gripper, the upper rear gripper, the lower front gripper and the lower rear gripper are closed to a central pipe gripping space, and the pipe at the center is gripped powerfully.

The utility model discloses a compound action is swift effective, walks to position accurately, makes things convenient for electrified accurate control.

The utility model discloses a unloading tubular product cutting production line on zero tails of many chucks reasonable in design, simple structure, safe and reliable, convenient to use, easy to maintain have fine using value widely.

Drawings

FIG. 1 is a schematic view of the main assembly structure of the present invention;

FIG. 2 is a left side view structure diagram of the general assembly of the present invention;

FIG. 3 is a schematic diagram of the assembly right view structure of the present invention;

FIG. 4 is a schematic view of the general assembly of the present invention;

FIG. 5 is a schematic view of the overall assembly three-dimensional structure of the present invention;

FIG. 6 is a schematic view of the overall assembly three-dimensional structure of the present invention;

FIG. 7 is a schematic view of the overall assembly three-dimensional structure of the present invention;

FIG. 8 is a schematic view of the overall assembly of the present invention;

FIG. 9 is a schematic view of a partial three-dimensional structure of the present invention;

FIG. 10 is a schematic view of a partial three-dimensional structure of the present invention;

reference numerals in FIGS. 1 to 10 denote:

1. a frame, 2, a track,

3. a front chuck, 4, a middle chuck, 5, a rear chuck, 6, a cutting portal frame, 7 and a cutting mechanism,

8. a lifting follow-up centering support mechanism is arranged,

9. a wire end follow-up blanking mechanism is arranged,

10. a wire end clamping mechanism is arranged on the wire end clamping mechanism,

11. a navigation frame 12 and a traveling mechanism;

fig. a1 is a schematic view of a partial three-dimensional structure of the lifting follow-up centering support mechanism of the present invention;

fig. a2 is a schematic view of a partial three-dimensional structure of the lifting follow-up centering support mechanism of the present invention;

fig. a3 is a schematic view of a partial three-dimensional structure of the lifting follow-up centering support mechanism of the present invention;

fig. a4 is a schematic view of a partial three-dimensional structure of the lifting follow-up centering support mechanism of the present invention;

fig. a5 is a schematic perspective view of the lift servo centering support mechanism of the present invention;

fig. a6 is a schematic front view of the lifting follow-up centering support mechanism of the present invention;

fig. a7 is a rear view schematic structural diagram of the lifting follow-up centering support mechanism of the present invention;

fig. a8 is a left view structural diagram of the lift servo centering support mechanism of the present invention;

fig. a9 is a schematic diagram of the right view structure of the lifting follow-up centering support mechanism of the present invention;

fig. a10 is a schematic top view of the lift servo centering support mechanism of the present invention;

fig. a11 is a schematic bottom view of the lifting follow-up centering support mechanism of the present invention;

the reference symbols in the attached figures a 1-a 11 represent:

a1, a fixed base, a2, a primary lifter, a3, a lifting push rod, a4, a primary lifting seat,

a5, a secondary elevator, a6, a driving gear,

a7, a slide seat component,

a8, a secondary lifting frame, a9, a slide rail component,

a10, and a rack bar,

a11, centering and supporting the component,

a12, a central turntable, a13, a centering support disk, a14, a tube edge rolling roller, a15, a horizontal rolling roller,

a16, an optical axis guide post group,

a17, a rotary cylinder fixing plate, a18, a rotary cylinder, a19 and an angle sensor,

a20, a secondary lifting plate,

a21, a speed reducer;

fig. b1 is a schematic structural view of the end-of-line follow-up blanking mechanism of the present invention;

fig. b2 is a left view structural diagram of the end-of-line follow-up blanking mechanism of the present invention;

fig. b3 is a schematic structural view of the left-view direction of the unloading support plate of the end-of-line follow-up unloading mechanism of the present invention in an overturning unloading state;

fig. b4 is a schematic diagram of the structure of the end-of-line follow-up blanking mechanism of the present invention as seen from the right;

fig. b5 is a rear view structure diagram of the end-of-line follow-up blanking mechanism of the present invention;

fig. b6 is a schematic view of the top view structure of the end-of-line follow-up blanking mechanism of the present invention;

fig. b7 is a schematic view of the bottom structure of the end-of-line follow-up blanking mechanism of the present invention;

fig. b8 is a schematic structural view of the wire end follow-up blanking mechanism perspective discharging support plate of the present invention;

fig. b9 is a schematic structural view of the wire end follow-up blanking mechanism perspective discharging support plate of the present invention;

fig. b10 is a schematic structural view of the wire end follow-up blanking mechanism perspective discharging support plate of the present invention;

fig. b11 is a schematic structural view of the line end follow-up blanking mechanism hiding the discharging support plate of the utility model;

fig. b12 is a schematic perspective view of the wire end follow-up blanking mechanism of the present invention;

the symbols in figures b1 to b12 represent:

b1, an upstream fixed seat, b2, a downstream fixed seat,

b3, an upstream end face, b4, an upstream fixed slide block, b5, an upstream shaft seat,

b6, a downstream end face, b7, a downstream fixed slide block, b8, a downstream shaft seat,

b9, an upstream follow-up lifting plate, b10, an upstream guide rail, b11, an upstream rack,

b12, a downstream follow-up lifting plate, b13, a downstream guide rail, b14, a downstream rack,

b15 and a transmission shaft,

b16, an upstream gear, b17, a downstream gear,

b18, a follow-up motor base, b19, a follow-up motor, b20 and a driving gear,

b21, an upstream cylinder hinged seat, b22, an upstream cylinder,

b23, a downstream cylinder hinged seat, b24, a downstream cylinder,

b25, a discharge supporting plate bottom hinged support,

b26, a discharge supporting plate,

b27, an extension part, b28, a lifting inclined plate hinged support, b29, a lifting inclined cylinder, b30, a lifting inclined push pull rod,

b31, optical axis, b32, right-angle hinged support, b33, short-side hinged hole, b34, long-side hinged hole,

b35, a rising plate, b36, a downstream frame, b37 and a concave platform,

b38, a rising sloping plate is matched with the gap, b39 and a blind end;

fig. c1 is a schematic view of the final clamping mechanism assembly of the present invention;

fig. c2 is a schematic structural view of the end wire clamping mechanism of the present invention hiding the outer wall of the clamping box;

fig. c3 is a schematic structural view of the wire end clamping mechanism of the present invention clamping the hidden top box wall of the box body;

fig. c4 is a schematic front view of the structure of fig. c3 according to the present invention;

fig. c5 is a schematic diagram of the structure of fig. c4 according to the present invention;

fig. c6 is a schematic top view of fig. c4 according to the present invention;

fig. c7 is a schematic structural view of the wire end clamping mechanism of the present invention after clamping the box body and hiding the top box wall and the upper linkage plate;

fig. c8 is a schematic perspective view of the wire end clamping mechanism clamping box of the present invention;

fig. c9 is a schematic structural view of the hidden top box wall of fig. c8 according to the present invention;

fig. c10 is a schematic structural view of the hidden upper linkage plate of fig. c9 of the present invention;

fig. c11 is a schematic view of the clamping box body of the present invention showing a three-dimensional structure after the upper linkage plate and the middle fixing plate are hidden;

fig. c12 is a schematic perspective view of the rotation angle of fig. c11 according to the present invention;

fig. c13 is a schematic perspective view of the rotation angle of fig. c11 according to the present invention.

The symbols in figures c1 to c13 represent:

c1, a wire end frame cantilever, c2, a cantilever fixing seat, c3, a clamping mechanism lifter, c4 and a lifting rod,

c5, clamping the box body,

c6, the wall of the top box,

c7, a clamping executing mechanism,

c8, front box wall, c9, rear box wall, c10, middle fixing plate, c11, upper cavity, c12 and lower cavity,

c13, a slot on the front wall, c14, a slot on the rear wall, c15 and an upper linkage plate,

c16, an upper front grip, c17, an upper rear grip,

c18, an upper front guide rail, c19, an upper rear guide rail,

c20, a lower front guide rail, c21, a lower rear guide rail,

c22, a front telescopic push-pull cylinder, c23, a rear telescopic push-pull cylinder, c24 and a piston rod,

c25, an upper front slide block, c26, an upper rear slide block,

c27, an upper rack, c28, a duplicate gear shaft, c29, an upper gear, c30 and a lower gear,

c31, a lower linkage plate, c32, a bottom box wall, c33, a bottom wall front slotted hole, c34, a bottom wall rear slotted hole,

c35, a lower rack bar,

c36, lower front slide block, 37, lower rear slide block,

c38, optical axis guide post group, c39, optical axis guide post, c40, guide post seat, c41 and guide hole,

c42, a bending part, c43, a tube grabbing space,

c44, down front grip, c45, down rear grip.

Detailed Description

The following detailed description is made on the multi-chuck zero-tailing feeding and discharging pipe cutting production line in combination with the accompanying drawings.

As shown in the attached drawings, the multi-chuck zero-tailing feeding and discharging pipe cutting production line comprises a rack, wherein a parallel flight rail arranged along the length direction of the rack is arranged on the rack, a front chuck, a middle chuck and a rear chuck are at least arranged on the parallel flight rail, a cutting portal frame is arranged on the parallel flight rail, and a cutting mechanism is configured on the cutting portal frame; the machine frame is provided with a lifting follow-up centering supporting mechanism, a wire end follow-up blanking mechanism and a wire end clamping mechanism.

As shown in the accompanying drawing of part a:

the lifting follow-up centering support mechanism of the pipe cutting production line of the utility model structurally comprises a fixed base, a first-level lifting seat and a second-level lifting frame,

the bottom of the fixed base a1 is fixedly connected with a vertically arranged first-level lifter a2, a lifting push rod a3 of the first-level lifter a2 penetrates out of the fixed base a1 from the lower part of the fixed base, the top end of the lifting push rod a3 is fixedly connected with a first-level lifting seat a4, a horizontally arranged second-level lifter a5 is fixedly arranged on the first-level lifting seat a4, and an axial output driving gear a6 of the second-level lifter a5,

the side wall of the primary lifting seat a4 is fixedly connected with a sliding seat component a7,

a secondary lifting frame a8 is arranged at the side of the primary lifting seat a4, a slide rail component a9 in the vertical direction is arranged on the secondary lifting frame a8,

the slide carriage assembly a7 is connected with the slide rail assembly a9 in a sliding fit manner,

a rack a10 in the vertical direction is fixedly connected to the secondary lifting rack a8, and the rack a10 is parallel to a sliding rail of the sliding rail assembly;

a driving gear a6 output by the secondary elevator a5 is meshed with a rack a 10;

a lifting push rod a3 of the primary lifter a2 pushes and pulls the primary lifting seat a4, so that the primary lifting seat realizes primary lifting action; the secondary lifting machine a5 drives the driving gear to rotate positively and negatively, so that the rack moves up and down relative to the driving gear, and the rack drives the whole secondary lifting frame 8 to realize secondary lifting through the sliding fit of the sliding seat assembly and the sliding rail assembly;

the top end of the secondary lifting frame a8 is provided with a centering support component a 11;

the centering support assembly a11 is provided with a horizontally arranged center turntable a12, a horizontal centering support disk a13 is coaxially arranged in the axial direction of the center turntable a12, the centering support disk is coaxially matched with the center turntable a13 in a coaxial driving manner,

two ends of the centering support disc a13 in the length direction are respectively provided with a vertical tube edge rolling roller a 14; the roll shafts of the two tube edge rolling rolls are fixedly connected to the centering support disc; the roll body of each tube edge rolling roll freely rotates relative to the roll shaft where the roll body is located;

a horizontal rolling roller a15 in the horizontal direction is arranged on one side edge of the centering support plate a13 between the two tube edge rolling rollers; the roll shaft of the horizontal rolling roll a15 is fixedly connected on the side edge of the centering support plate where the horizontal rolling roll a15 is positioned, and the roll body of the horizontal rolling roll freely rotates relative to the roll shaft;

the upper edge of the horizontal rolling roller a15 is higher than the upper surface of the centering support disk.

The bottom fixedly connected with of one-level lift seat has the vertical optical axis guide post group a16 who sets up, and every two liang of optical axis guide posts of optical axis guide post group are parallel to each other, and each optical axis guide post of optical axis guide post group extends downwards and pierces into the guide holder hole on the unable adjustment base, and each optical axis guide post passes the guide holder hole and extends to the unable adjustment base below, and the length of each optical axis guide post is greater than the length of the lift stroke of the lift push rod of one-level lift.

The top end of the secondary lifting frame a8 is fixedly connected with a rotary cylinder fixing plate a17, a rotary cylinder fixing plate a17 is fixedly connected with a rotary cylinder a18, a rotary cylinder driver a18 is movably connected with a central turntable a12, and a central turntable a12 drives a centering supporting plate a 13.

The slewing cylinder is provided with an angle sensor a 19.

Fixedly connected with second grade lifter plate a20 on the second grade crane, second grade lifter plate fixed connection is on slide rail assembly a 9.

The secondary lift 5 drives a speed reducer a21, and a speed reducer a21 is in driving connection with a driving gear a 6.

As shown in the accompanying drawing of part b:

the utility model relates to a pipe cutting production line end follow-up blanking mechanism, which comprises an upstream fixed seat b1 and a downstream fixed seat b2,

an upstream fixed sliding block b4 is fixedly connected with an upstream end face b3 of the upstream fixed seat b 1;

an upstream shaft seat b5 is arranged on the seat body of the upstream fixed seat b 1;

a downstream fixed sliding block b7 is fixedly connected with a downstream end face b6 of the downstream fixed seat b 2;

a downstream shaft seat b8 is arranged on the seat body of the downstream fixed seat b 2;

an upstream guide rail b10 and an upstream rack b11 are fixedly connected to the inner side plate surface of the upstream follow-up lifting plate b9, the upstream guide rail b10 and the upstream rack are parallel to each other and are vertically arranged, and the upstream guide rail b10 is in sliding fit with the upstream fixed sliding block b 4;

a downstream guide rail b13 and a downstream rack b14 are fixedly connected to the inner side plate surface of the downstream follow-up lifting plate b12, the downstream guide rail b13 and the downstream rack are parallel to each other and are vertically arranged, and the downstream guide rail b13 is in sliding fit with a downstream fixed sliding block b 7;

a transmission shaft b15 is connected between the upstream shaft seat b5 and the downstream shaft seat b8 in a penetrating manner, and the transmission shaft b15 is horizontally arranged;

the upstream end of the transmission shaft b15 is coaxially and fixedly connected with an upstream gear b16, and the downstream end of the transmission shaft is coaxially and fixedly connected with a downstream gear b 17;

the upstream gear b16 is meshed with the upstream rack b 11;

the downstream gear b17 is meshed with the downstream rack b 14;

a follow-up motor seat b18 is fixedly connected to the upstream end face of the upstream fixed seat b1, a follow-up motor b19 is fixedly arranged on a follow-up motor seat b18, a follow-up motor shaft outputs a driving gear b20, and a driving gear b20 is meshed with an upstream gear b 16;

The front edge of the outer side plate surface of the upstream follow-up lifting plate b9 is fixedly connected with an upstream cylinder hinged seat b21, an upstream cylinder b22 is hinged on the upstream cylinder hinged seat, and the upstream cylinder is vertically arranged;

the front edge of the outer side plate surface of the downstream follow-up lifting plate b10 is fixedly connected with a downstream cylinder hinged seat b23, a downstream cylinder b24 is hinged on the downstream cylinder hinged seat, and the downstream cylinder is vertically arranged;

the top end of an upstream push-pull rod of the upstream cylinder b22, the top end of a downstream push-pull rod of the downstream cylinder b24, the top end of the rear edge of the upstream follow-up lifting plate b9 and the top end of the rear edge of the downstream follow-up lifting plate b12 are respectively provided with a discharging support plate bottom hinged support b 25;

the bottom hinged supports of the four discharging supporting plates are connected with the bottom surface of the discharging supporting plate b 26;

the side edge of the discharge supporting plate b26 is synchronously lifted or pulled down by the upstream air cylinder 22 and the downstream air cylinder 24, the other side edge of the discharge supporting plate b26 is rotatably hinged with the top ends of the upstream follow-up lifting plate b9 and the downstream follow-up lifting plate 12 through the discharge supporting plate bottom hinged seat b25 where the discharge supporting plate b26 is located, the lifted or pulled-down discharge supporting plate b26 forms a laterally-overturning and inclined discharge state, and the discharge supporting plate 26 returns to the horizontal position after being discharged.

The upstream end of the discharging support plate extends towards the upstream direction, the bottom surface of the discharging support plate of the extension part b27 is provided with a rising inclined plate hinged support b28, a rising inclined air cylinder b29 is hinged on the rising inclined plate hinged support b28, a rising inclined push pull rod b30 of the rising inclined air cylinder b29 faces towards the upstream direction,

the upstream end of the lifting and inclined push pull rod b30 is vertically hinged on an optical axis b31, the two ends of the optical axis b31 are respectively hinged on short side hinge holes b33 of two right-angle hinge seats b32,

the long-side hinge holes b34 of the two right-angle hinge bases are hinged with the downstream edge b36 of the lifting inclined plate b35 together;

a concave platform b37 is arranged at the downstream side of the inclined lifting plate,

the plate surface at the upstream end of the discharging supporting plate is provided with an inclined ascending plate matching opening b 38;

the concave platform is matched and buckled with the blind end b39 of the ascending sloping plate matching opening of the discharging supporting plate.

The upstream cylinder and the downstream cylinder are arranged in parallel.

The follow-up motor is powered and driven by the power unit.

As shown in the accompanying drawing of section c:

a cantilever fixing seat c2 is fixedly connected to a cantilever c1 of the wire end frame,

the cantilever mount c2 is provided with a clamping mechanism lifter c3,

the clamping mechanism lifter c3 is fixedly arranged above the cantilever fixing seat c2, a lifting rod c4 of the clamping mechanism lifter c3 penetrates through the cantilever fixing seat c2 downwards, and the lower end of a lifting rod c4 is fixedly connected to the top box wall 6 of the clamping box body c 5;

a clamping actuating mechanism c7 is arranged in the clamping box body c 5;

an intermediate fixing plate c10 is fixedly connected between the front box wall c8 and the rear box wall c9 of the clamping box body c5, and the intermediate fixing plate c10 divides the inner cavity of the clamping box body into an upper cavity c11 and a lower cavity c 12;

the top parts of the front box wall 8 and the rear box wall 9 of the clamping box body 5 are respectively provided with a front wall upper slotted hole c13 and a rear wall upper slotted hole c14 which are corresponding, an upper linkage plate c15 is arranged at the top part of the inner cavity of the clamping box body, the front edge and the rear edge of the upper linkage plate c15 respectively extend out of the front wall upper slotted hole c13 and the rear wall upper slotted hole c14,

the front edge of the extending part of the upper linkage plate is fixedly connected with an upper front grip c16 which is arranged downwards,

the rear edge of the extending part of the upper linkage plate is fixedly connected with an upper rear hand grip c17 which is arranged downwards;

the upper surface of the middle fixing plate is fixedly provided with an upper front guide rail c18 and an upper rear guide rail c19 which are parallel to each other,

the lower front guide rail c20 and the lower rear guide rail c21 which are parallel to each other are fixedly arranged on the lower surface of the middle fixing plate;

the upper surface of the middle fixed plate c10 is fixedly connected with a front telescopic push-pull cylinder c22 and a rear telescopic push-pull cylinder c23 which are parallel to the upper front guide rail,

the piston rods c24 of the front telescopic push-pull cylinder c22 and the rear telescopic push-pull cylinder c23 are fixedly connected with an upper linkage plate c15 in the same direction respectively; a piston rod c24 of the front telescopic push-pull cylinder c22 and the rear telescopic push-pull cylinder c23 synchronously pushes and pulls the upper linkage plate c 15;

the lower surface of the upper linkage plate c15 is fixedly connected with an upper front slide block c25 and an upper rear slide block c26,

the upper front slide block 25 is in sliding fit with the upper front guide rail c 18;

the upper rear slide block 26 is in sliding fit with the upper rear guide rail c 19;

the upper linkage plate 15 is fixedly connected with an upper rack c27, and the direction of the upper rack 27 is parallel to the front telescopic push-pull cylinder;

the center of the middle fixing plate c10 is provided with a duplicate gear shaft c28 which penetrates through the middle fixing plate, and the duplicate gear shaft is vertically arranged;

the upper rack c27 is meshed with the upper gear c29 of the dual gear shaft 28;

a lower linkage plate c31 is arranged at the bottom of a lower cavity of the clamping box body c5, and a bottom box wall c32 of the clamping box body below the front edge and the rear edge of the lower linkage plate c31 is respectively provided with a corresponding bottom wall front slotted hole c33 and a bottom wall rear slotted hole c 34;

the front edge of the lower linkage plate c31 is fixedly connected with a lower front gripper c44 arranged in a downward direction; the lower front hand grip c44 penetrates through the front slotted hole c33 of the bottom wall downwards;

the rear edge of the lower linkage plate c31 is fixedly connected with a lower rear hand grip c45 which is arranged downwards; the lower rear hand grip c45 penetrates through the bottom wall rear slotted hole c34 downwards;

the lower linkage plate c31 is fixedly connected with a lower rack c 35;

the lower gear c30 of the duplicate gear shaft c28 is meshed with the lower rack c 35;

the upper surface of the lower linkage plate c31 is respectively fixedly connected with a lower front slide block c36 and a lower rear slide block c37,

the lower front slide block c36 is matched with the lower front guide rail c20 of the middle fixing plate in a sliding way;

the lower rear slide block c37 is matched with the lower rear guide rail c21 of the middle fixing plate in a sliding way.

Any one of the clamping mechanism lifter c3, the front telescopic push-pull cylinder c22 and the rear telescopic push-pull cylinder c23 adopts an electric cylinder, an air cylinder or a hydraulic cylinder which can work in a self-locking forward and reverse mode, and is driven by an electric power unit or a hydraulic unit.

The top surface of the clamping box body c5 is fixedly connected with an optical axis guide column group c38, and each optical axis guide column c39 which is parallel to each other in the optical axis guide column group penetrates out of a guide hole c41 of a guide column seat c40 on the cantilever fixed seat from bottom to top;

The upper front hand grip and the upper rear hand grip are the same in size and shape and are respectively provided with a bending part c42 in the same direction;

and a pipe gripping space c43 is formed between the bent parts of the upper front hand grip and the upper rear hand grip and the bent parts of the lower front hand grip and the lower rear hand grip.

the upper rack and the lower rack are parallel to each other;

the upper linkage plate and the lower linkage plate are parallel to each other;

The lifting follow-up centering support mechanism, the wire end follow-up blanking mechanism and the wire end clamping mechanism are respectively provided with an independent electric power mechanism. Each power dynamic mechanism controls the execution action to match with the feeding, centering, running, cutting and blanking of the pipe through the integrated controller.

The utility model discloses a unloading tubular product cutting production line on zero tails of many chucks:

before loading, the front card and the middle card move to the front of the gantry, and the rear card moves to the last;

Claims

1. The multi-chuck zero-tailing feeding and discharging pipe cutting production line comprises a rack, wherein a parallel track arranged along the length direction of the rack is arranged on the rack, a front chuck, a middle chuck, a rear chuck and a cutting portal frame are at least arranged on the parallel track, and a cutting mechanism is configured on the cutting portal frame; the method is characterized in that: the machine frame is provided with a lifting follow-up centering supporting mechanism, a wire end follow-up blanking mechanism and a wire end clamping mechanism.

2. The multi-chuck zero-tailing feeding and discharging pipe cutting production line as claimed in claim 1, characterized in that: the feeding section of the frame is provided with a lifting follow-up centering support mechanism fixing unit, the lifting follow-up centering support mechanism fixing units are arranged below the flight path and are sequentially arranged along the flight path direction, at least two groups of lifting follow-up centering support mechanisms are arranged in the sequentially arranged lifting follow-up centering support mechanism fixing units,

the center of the lifting follow-up centering support mechanism is arranged right below the central axes of the front chuck, the middle chuck and the rear chuck;

the lifting follow-up centering support mechanism comprises a fixed base, a first-stage lifting seat and a second-stage lifting frame,

a driving gear output by the secondary elevator is meshed with the rack;

the height of the upper roll edge of the horizontal rolling roll is higher than the upper surface of the centering support disc;

the central turntable and the centering support plate are arranged right below the central axes of the front chuck, the middle chuck and the rear chuck;

the fixed base of the lifting follow-up centering support mechanism is fixedly connected to the frame.

3. The multi-chuck zero-tailing feeding and discharging pipe cutting production line as claimed in claim 1 or 2, and is characterized in that: the wire end section of the frame is provided with a wire end follow-up blanking mechanism,

the line end follow-up blanking mechanism comprises an upstream fixed seat and a downstream fixed seat,

an upstream shaft seat is arranged on the seat body of the upstream fixed seat;

the upstream gear is meshed with the upstream rack;

the downstream gear is meshed with the downstream rack;

the concave platform is matched and fastened with the blind end of the ascending inclined plate of the unloading supporting plate in a matching way;

the upstream fixing seat and the downstream fixing seat are respectively and fixedly connected to the rack below the track.

4. The multi-chuck zero-tailing feeding and discharging pipe cutting production line as claimed in claim 1, 2 or 3, characterized in that: a wire tail clamping mechanism is arranged on the rack at the wire tail end;

the wire end clamping mechanism comprises a wire end rack cantilever and a clamping box body,

a clamping mechanism lifter is arranged on the cantilever fixed seat,

a clamping actuating mechanism is arranged in the clamping box body;

the upper rear slide block is in sliding fit with the upper rear guide rail;

the upper rack is meshed with the upper gear of the duplex gear shaft;

the lower linkage plate is fixedly connected with a lower rack;

the lower gear of the duplicate gear shaft is meshed with the lower rack;

the lower rear slide block is in sliding fit with the lower rear guide rail of the middle fixed plate;

the wire tail frame cantilever is vertically and fixedly connected with one side of the frame at the wire tail end.

5. The multi-chuck zero-tailing feeding and discharging pipe cutting production line as claimed in claim 1, characterized in that: the front chuck, the middle chuck, the rear chuck and the cutting portal frame are respectively arranged on the air track through independent air frames and are in sliding connection with the air track.

6. The multi-chuck zero-tailing feeding and discharging pipe cutting production line as claimed in claim 1, characterized in that: the front chuck, the middle chuck, the rear chuck and the cutting gantry are respectively provided with an independent traveling mechanism which accurately travels back and forth along the air track.

7. The multi-chuck zero-tailing feeding and discharging pipe cutting production line as claimed in claim 1, characterized in that: the lifting follow-up centering support mechanism, the wire end follow-up blanking mechanism and the wire end clamping mechanism are respectively provided with an independent electric power mechanism.

8. The multi-chuck zero-tailing feeding and discharging pipe cutting production line as claimed in claim 1, characterized in that: the machine frame is provided with a lifting follow-up centering support mechanism formed by a flat rotating pipe edge rolling double roller for clamping the pipe centering with two-stage lifting action, a line end follow-up blanking mechanism for discharging the pipe in the radial side direction and a line end clamping mechanism for clamping the pipe by four-claw double linkage.