CN111299878A - A metal pipe fitting lifting jig for laser cutting machine - Google Patents

Abstract

The invention relates to a metal pipe fitting clamping and lifting clamp for a laser cutting machine, which comprises a base, wherein a clamping mechanism is arranged above the base, one end of the base is provided with a pair of first adjusting arms, and the other end of the base is provided with a pair of second adjusting arms; the first adjusting arm and the second adjusting arm are arranged in an X shape; a rotating shaft is arranged between the middle parts of the first adjusting arm and the second adjusting arm; a first fixing seat is arranged at one end of the base, a first mounting shaft is inserted between the lower end of the first adjusting arm and the first fixing seat, a sliding seat is arranged at the other end of the base, and a second mounting shaft is inserted between the lower end of the second adjusting arm and the sliding seat; the bottom of the sliding seat is provided with a first sliding block, the base is provided with a first guide rail, and the first sliding block is arranged on the first guide rail; the clamping mechanism comprises a lifting plate, and the upper ends of the first adjusting arm and the second adjusting arm are respectively arranged on two sides of the bottom of the lifting plate; the invention greatly improves the efficiency of clamping the metal pipe fitting.

Description

A metal pipe fitting lifting jig for laser cutting machine

technical field

The invention relates to a jig, in particular to a metal pipe fitting lifting jig for a laser cutting machine.

Background technique

Fixture refers to the device used to fix the processing object in the process of mechanical manufacturing, so that it occupies the correct position to accept construction or inspection. In any process in the process, the device used to quickly, easily and safely install the workpiece is all Can be called a jig. The three-coordinate fixture is used on the measuring machine, and its modular support and reference device are used to complete the flexible fixation of the measured workpiece. The device can be automatically programmed to support workpieces and establish unlimited reference points for workpiece configuration. Advanced special-purpose software can generate workpiece clamping programs in seconds directly from the workpiece geometry data. The laser cutting machine is to focus the laser emitted from the laser into a high power density laser beam through the optical path system. The laser beam is irradiated on the surface of the workpiece to make the workpiece reach the melting point or boiling point, while the high-pressure gas coaxial with the beam blows the molten or vaporized metal away. With the movement of the relative position of the beam and the workpiece, the material is finally formed into a slit, so as to achieve the purpose of cutting. Laser cutting process replaces the traditional mechanical knife with invisible beam. It has the characteristics of high precision, fast cutting, not limited to cutting pattern, automatic typesetting to save materials, smooth incision, low processing cost, etc. It will be gradually improved or replaced in Traditional metal cutting process equipment. The mechanical part of the laser cutter head has no contact with the workpiece, and will not scratch the surface of the workpiece during work; the laser cutting speed is fast, the incision is smooth and flat, and generally does not require subsequent processing; the cutting heat-affected zone is small, and the plate deformation is small. The existing fixture is inconvenient to be installed on the laser cutting machine, and it is inconvenient to adjust the fixture vertically.

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the defects and deficiencies of the prior art, and provide a main clamping seat for firmly clamping the metal pipe fittings through the main fixing block and the main clamping block, which greatly improves the efficiency of clamping the metal pipe fittings; The vertical lifting and lowering adjustment of the clamped metal pipe fittings is more convenient for the laser cutting machine to perform laser cutting of the clamped metal pipe fittings.

For achieving the above object, the technical scheme adopted in the present invention is:

A metal pipe fitting lifting jig for laser cutting machine, comprising a base, a clamping mechanism is arranged above the base, a pair of first adjustment arms are arranged on one end of the base, and a pair of second adjustment arms are arranged at the other end of the base arm; the first adjusting arm and the second adjusting arm are arranged in an X-shape; a rotating shaft is arranged between the middle part of the first adjusting arm and the second adjusting arm; one end of the base is provided with a first fixing seat, and the A first installation shaft is inserted between the lower end and the first fixed seat, a sliding seat is arranged on the other end of the base, and a second installation shaft is inserted between the lower end of the second adjusting arm and the sliding seat; the bottom of the sliding seat is provided with a second installation shaft. There is a first sliding block, a first guide rail is arranged on the base, and the first sliding block is installed on the first guide rail; a threaded seat is arranged between the sliding seats, a threaded groove is arranged in the middle of the threaded seat, and a stepping motor is arranged on the base , The front part of the stepping motor is provided with a rotating shaft, the front end of the rotating shaft is provided with a tapping thread, the tapping thread passes through the thread groove of the thread seat, and the tapping thread and the thread groove of the thread seat are connected by thread; the clamping mechanism includes a lifting plate, The upper ends of the first adjusting arm and the second adjusting arm are respectively installed on both sides of the bottom of the lifting plate; the lifting plate is provided with a clamping mechanism, the clamping mechanism includes a main clamping seat and a pair of auxiliary clamping seats, the main clamping seat It is arranged in a triangle with a pair of auxiliary clamping bases. The main clamping base and a pair of auxiliary clamping bases are installed on the lifting plate. The top of the main clamping base is provided with a main fixing block, and the main fixing block is provided with a main clamping block. , the top of the main clamping block is provided with a main clamping groove in the position facing the outside, the auxiliary clamping base is provided with a sub-fixing block, the auxiliary fixing block is provided with a sub-clamping block, and the top of the sub-clamping block faces the outward position. A secondary clamping groove is provided, and the secondary clamping groove is matched with the main clamping groove; a first hydraulic cylinder is provided on the lifting plate, and a first piston rod is provided at the front of the first hydraulic cylinder. The clamping seat is connected; the clamping cavity is between the main clamping block and the auxiliary clamping block.

Further, the bottom of the main clamping seat is provided with a main sliding block, the bottom of the auxiliary clamping seat is provided with an auxiliary sliding block, the lifting plate is provided with a main guide rail and a pair of auxiliary guide rails, and the main sliding block is installed on the main guide rail. , the auxiliary slider is installed on the auxiliary guide rail; the front end of the main guide rail is provided with a main limit block, and the main limit block is installed on the outer side of the main slider; the front end of the auxiliary guide rail is provided with a auxiliary limit block, and the auxiliary limit block is installed on the outer side of the sub-slider.

Further, the top of the main clamping seat is provided with a positioning block, the bottom of the main fixing block is provided with a positioning groove, and the positioning block is installed in the positioning groove.

Further, a docking mechanism is provided between the main clamping seat and the auxiliary clamping seat, and the docking mechanism includes a positioning plate. The positioning plate is in a triangular shape. The connecting arm is connected with the main clamping seat, the other two connecting arms of the positioning plate are connected with the auxiliary clamping seat, the bottom of the positioning plate is provided with a positioning cylinder, the outer peripheral surface of the positioning cylinder is sleeved with a positioning plate, and the top of the positioning plate is provided with a mounting plate column.

Further, each of the triangular positions of the positioning plate is provided with a clamping groove, and the end of the connecting arm is installed at the position of the clamping groove.

Further, the lifting plate is provided with a second hydraulic cylinder, the front part of the second hydraulic cylinder is provided with a second piston rod, the front end of the second piston rod is provided with a guide seat, the middle part of the guide seat is provided with an open cavity, and the guide seat is The front part of the first piston rod is provided with a guide groove; the front end of the first piston rod is provided with a reciprocating motion seat, the front part of the reciprocating motion seat is provided with a moving groove, the rear part of the main clamping seat is fixed at the position of the moving groove, and the main clamping seat is installed in The position of the guide groove; the lifting plate is provided with a second hydraulic cylinder seat, and the second hydraulic cylinder is installed on the second hydraulic cylinder seat.

Further, a first hydraulic cylinder base is provided on the lifting plate, and the first hydraulic cylinder is mounted on the first hydraulic cylinder base.

Further, the base is provided with a positioning seat, the top of the positioning seat is provided with a guide shell and a protective cylinder, the two sides of the guide shell are open structures, and the front part of the stepping motor is connected with the front part of the protective cylinder; through the axial position of the guide housing and the protective cylinder.

Further, a limit seat is arranged on the base, a limit block is arranged on the limit seat, a threaded hole is arranged on the upper part of the limit block, a reinforcing block is arranged between the limit seat and the limit block, and the front end of the tapping thread is threaded. Through the threaded hole, the threaded hole and the tapping are connected by thread.

Further, the front end of the first guide rail is provided with a limit block, and the limit block is installed in front of the first sliding block.

After the above structure is adopted, the beneficial effects of the present invention are as follows: the operator installs the metal pipe to be processed at the position of the clamping cavity, the main clamping seat passes through the main fixing block and the main clamping block and the auxiliary clamping seat passes through the auxiliary fixing block and the auxiliary clamping seat. The clamping block firmly clamps the metal pipe fittings, and the main clamping block firmly clamps the metal pipe fittings through the main clamping groove and the auxiliary clamping block through the auxiliary clamping groove; the first hydraulic cylinder controls the main clamp through the first piston rod The reciprocating movement of the seat is realized, which facilitates the flexible movement and adjustment of the main clamping seat. The main clamping seat firmly clamps the metal pipe fittings through the main fixing block and the main clamping block, which greatly improves the clamping force of the metal pipe fittings. Efficiency; the fixture is installed in the laser cutting machine, and the clamped metal pipe fittings can be easily laser cut by the laser cutting machine; the stepping motor controls the tapping through the rotating shaft to realize rotation, and the tapping rotates around the thread seat, and the stepping motor rotates around the thread seat. The feeding motor controls the tapping to rotate counterclockwise through the rotating shaft, the tapping rotates counterclockwise around the thread seat, and the thread seat moves backward along the first guide rail through the first slider of the sliding seat; the stepping motor is controlled by the rotating shaft The tapping realizes clockwise rotation, the tapping realizes clockwise rotation around the thread seat, and the thread seat moves along the first guide rail through the first sliding block of the sliding seat; thus, the sliding seat is controlled to move back and forth, and the sliding seat reciprocates back and forth. The movement drives the lower ends of the first adjusting arm and the second adjusting arm to realize the clutch, and the middle parts of the first adjusting arm and the second adjusting arm rotate around the rotation axis, so as to control the upper ends of the first adjusting arm and the second adjusting arm to realize the clutch, through The rotation of the first adjusting arm and the second adjusting arm around the rotation axis controls the clamping mechanism to realize vertical lifting and adjustment, so as to perform vertical lifting and adjustment of the clamped metal pipe fittings, which is more convenient for the laser cutting machine to clamp the clamped metal pipe fittings. Metal pipe fittings are laser cut.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of the clamping mechanism according to the present invention.

FIG. 3 is a schematic structural diagram of the clamping mechanism according to the present invention.

FIG. 4 is a schematic structural diagram of the electric heating mechanism according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIGS. 1 to 4 , a metal pipe fitting lifting fixture for a laser cutting machine according to the present invention includes a base 1 , a clamping mechanism 2 is arranged above the base 1 , and one end of the base 1 is provided with a clamping mechanism 2 . There is a pair of first adjustment arms 3, and a pair of second adjustment arms 4 are arranged on the other end of the base 1; the first adjustment arm 3 and the second adjustment arm 4 are arranged in an X-shape; the first adjustment arm 3 and the second adjustment arm 4 A rotating shaft 13 is arranged between the middle parts of the base 1; a first fixing seat 5 is arranged on one end of the base 1, and a first installation shaft 6 is inserted between the lower end of the first adjusting arm 3 and the first fixing seat 5, and the base 1 The other end is provided with a sliding seat 7, and a second mounting shaft 8 is inserted between the lower end of the second adjusting arm 4 and the sliding seat 7; the bottom of the sliding seat 7 is provided with a first sliding block 19, and the base 1 is provided with a first A guide rail 20, the first sliding block 19 is installed on the first guide rail 20; a threaded seat 18 is provided between the sliding blocks 7, and the middle of the threaded seat 18 is provided with a threaded groove; The front part of the motor 15 is provided with a rotating shaft 16, the front end of the rotating shaft 16 is provided with a tapping thread 17, the tapping thread 17 passes through the thread groove of the thread seat 18, and the tapping thread 17 and the thread groove of the thread seat 18 are connected by thread; The mechanism 2 includes a lifting plate 31, and the upper ends of the first regulating arm 3 and the second regulating arm 4 are respectively installed on both sides of the bottom of the lifting plate 31; the lifting plate 31 is provided with a clamping mechanism 43, and the clamping mechanism 43 includes a main clamping mechanism The base 44 and a pair of auxiliary clamping bases 53 are arranged in a triangular shape. The main clamping base 44 and a pair of auxiliary clamping bases 53 are installed on the lifting plate 31. The top of the seat 44 is provided with a main fixing block 45 , the main fixing block 45 is provided with a main clamping block 46 , the top of the main clamping block 46 is provided with a main clamping groove 47 at the outward facing position, and the auxiliary clamping seat 53 is provided with a main clamping groove 47 . A secondary fixing block 54 is provided, and a secondary clamping block 55 is arranged on the secondary fixing block 54. The top of the secondary clamping block 55 is provided with a secondary clamping groove 56 at the position facing the outside. The secondary clamping groove 56 and the main clamping groove 47 Matching; the lifting plate 31 is provided with a first hydraulic cylinder 32, the front part of the first hydraulic cylinder 32 is provided with a first piston rod 33, and the front end of the first piston rod 33 is connected with the main clamping seat 44; the main clamping block 46 Between it and the auxiliary clamping block 55 is a clamping cavity 60 .

The present invention is used for the lifting and lowering fixture for metal pipe fittings of laser cutting machines. The operator installs the metal pipe fittings to be processed at the position of the clamping cavity 60, and the main clamping seat 44 passes through the main fixing block 45, the main clamping block 46 and the auxiliary clamp. The seat 53 firmly clamps the metal pipe fittings through the auxiliary fixing block 54 and the auxiliary clamping block 55, and the main clamping block 46 passes through the main clamping groove 47 and the auxiliary clamping block 55. The auxiliary clamping groove 56 firmly clamps the metal pipe fittings. Clamping; the first hydraulic cylinder 32 controls the main clamping seat 44 through the first piston rod 33 to achieve back and forth reciprocating motion, so as to facilitate the flexible movement and adjustment of the main clamping seat 44. The clamping block 46 firmly clamps the metal pipe fittings, which greatly improves the efficiency of clamping the metal pipe fittings; the clamp is installed in the laser cutting machine, and the clamped metal pipe fittings can be easily laser cut by the laser cutting machine. The stepping motor 15 controls the tapping 17 to rotate through the rotating shaft 16, the tapping 17 realizes rotation around the thread seat 18, and the stepping motor 15 controls the tapping 17 to rotate counterclockwise through the rotating shaft 16, and the tapping 17 wraps the thread seat 18. To achieve counterclockwise rotation, the thread seat 18 moves backward along the first guide rail 20 through the first slider 19 of the sliding seat 7; the stepping motor 15 controls the tapping 17 to rotate clockwise through the rotating shaft 16, and the tapping 17 goes around The threaded seat 18 is rotated clockwise, and the threaded seat 18 is moved along the first guide rail 20 through the first sliding block 19 of the sliding seat 7; thus, the sliding seat 7 is controlled to move back and forth, and the back and forth reciprocating motion of the sliding seat 7 drives the first guide rail 20. The lower ends of an adjusting arm 3 and the second adjusting arm 4 are clutched, and the middle parts of the first adjusting arm 3 and the second adjusting arm 4 are rotated around the rotating shaft 13 , thereby controlling the upper ends of the first adjusting arm 3 and the second adjusting arm 4 The clutch is realized, and the clamping mechanism 2 is controlled by the rotation of the first adjusting arm 3 and the second adjusting arm 4 around the rotating shaft 13 to realize vertical lifting and adjustment, so that the vertical lifting and lowering of the clamped metal pipe fittings can be adjusted, which is more convenient for laser light. The cutting machine performs laser cutting on the clamped metal pipe fittings.

Preferably, the bottom of the main clamping seat 44 is provided with a main sliding block 48, the bottom of the auxiliary clamping seat 53 is provided with a secondary sliding block 57, the lifting plate 31 is provided with a main guide rail 49 and a pair of auxiliary guide rails 58, the main sliding block 48 is installed on the main guide rail 49, and the auxiliary slider 57 is installed on the auxiliary guide rail 58; the front end of the main guide rail 49 is provided with a main limit block 50, and the main limit block 50 is installed on the outer side of the main slider 48; the auxiliary guide rail 58 The front end is provided with an auxiliary limit block 59, which is installed on the outer side of the auxiliary slider 57; the main clamping seat 44 slides along the main guide rail 49 through the main slider 48, and the auxiliary clamping seat 53 passes through the auxiliary The slider 57 slides along the auxiliary guide rail 58, the main slider 48 is controlled by the main limit block 50, and the auxiliary slider 57 is controlled by the auxiliary limit block 59; The sliding stability of the main slider 48 is better.

Preferably, the top of the main clamping seat 44 is provided with a positioning block 52, the bottom of the main fixing block 45 is provided with a positioning groove 51, and the positioning block 52 is installed in the positioning groove 51; Positioning installation.

Preferably, a docking mechanism is provided between the main clamping seat 44 and the auxiliary clamping seat 53, and the docking mechanism includes a positioning plate 61, the positioning plate 61 is triangular in shape, and the triangular positions of the positioning plate 61 are provided with connecting arms 63, One connecting arm 63 of the positioning plate 61 is connected to the main clamping seat 44 , and the other two connecting arms 63 of the positioning plate 61 are connected to the auxiliary clamping seat 53 . The bottom of the positioning plate 61 is provided with a positioning cylinder 64 , and the outer circumference of the positioning cylinder 64 is The surface cover is provided with a positioning plate 65, and the top of the positioning plate 61 is provided with a mounting post 66; the triangular positions of the positioning plate 61 are provided with clamping grooves 62, and the end of the connecting arm 63 is installed at the position of the clamping groove 62; the first hydraulic cylinder 32 The main clamping seat 44 is controlled by the first piston rod 33 to achieve reciprocating movement, so as to facilitate the flexible movement and adjustment of the main clamping seat 44. The main clamping seat 44 slides along the main guide rail 49 through the main slider 48, and at the same time , the main clamping base 44 drives the auxiliary clamping base 53 to move through the connecting arm 63 and the positioning plate 61, and the auxiliary clamping base 53 slides along the auxiliary guide rail 58 through the auxiliary sliding block 57, so that the auxiliary sliding block 57 and the main sliding block The sliding stability of 48 is better; the movement flexibility of the main clamping seat 44 and the auxiliary clamping seat 53 is better, and the main clamping seat 44 firmly clamps the metal pipe fittings through the main fixing block 45 and the main clamping block 46, The auxiliary clamping seat 53 firmly clamps the metal pipe fittings through the auxiliary fixing block 54 and the auxiliary clamping block 55, which greatly improves the efficiency of clamping the metal pipe fittings.

Preferably, the lift plate 31 is provided with a second hydraulic cylinder 37 , the front part of the second hydraulic cylinder 37 is provided with a second piston rod 38 , the front end of the second piston rod 38 is provided with a guide seat 39 , and the middle of the guide seat 39 is provided with a guide seat 39 . There is an opening 40, the front part of the guide seat 39 is provided with a guide groove 42; the front end of the first piston rod 33 is provided with a reciprocating motion seat 34, the front part of the reciprocating motion seat 34 is provided with a moving groove 35, The main clamping seat 44 is installed at the position of the guide groove 42; the lifting plate 31 is provided with a second hydraulic cylinder seat 41, and the second hydraulic cylinder 37 is installed on the second hydraulic cylinder seat 41; The hydraulic cylinder 37 controls the guide seat 39 to move through the second piston rod 38 , and the adjusted guide seat 39 limits the main clamping seat 44 to the position of the guide groove 42 , and the main clamping seat 44 moves more stably through the guide groove 42 it is good.

Preferably, the lifting plate 31 is provided with a first hydraulic cylinder base 36 , and the first hydraulic cylinder 32 is installed on the first hydraulic cylinder base 36 ; the first hydraulic cylinder 32 is positioned and installed through the first hydraulic cylinder base 36 .

Preferably, the base 1 is provided with a positioning seat 14 , the top of the positioning seat 14 is provided with a guide shell 26 and a protective cylinder 27 , both sides of the guide shell 26 are open structures, the front of the stepping motor 15 and the front of the protective cylinder 27 are The rotating shaft 16 passes through the axial position of the guide shell 26 and the protective cylinder 27; the rotation stability of the rotating shaft 16 is better through the guide shell 26 and the protective cylinder 27

Preferably, a limiting seat 22 is provided on the base 1 , a limiting block 23 is provided on the limiting seat 22 , a threaded hole 24 is provided on the upper part of the limiting block 23 , and a reinforcing block is provided between the limiting seat 22 and the limiting block 23 . 25. The front end of the tapping 17 passes through the threaded hole 24, and the threaded hole 24 and the tapping 17 are connected by thread; The reciprocating motion stability of tapping 17 is better.

Preferably, the front end of the first guide rail 20 is provided with a limit block 21 , and the limit block 21 is installed in front of the first slider 19 ; the limit block 21 is used to limit the front of the first slider 19 .

Preferably, an electric heating mechanism is provided on the top surface of the positioning plate 61 , and the electric heating mechanism includes a fixed shell 67 and an electric heating block 68 . The interior of the fixed shell 67 is provided with a temperature controller 70 , and the top surface of the fixed shell 67 is provided with a pair of insulating tubes. 69, the electric heating block 68 is installed on the top of the insulating tube 69, and a cable is installed in the insulating tube 69, one end of the cable is connected with the thermostat 70, and the other end of the cable is connected with the electric heating block 68; the electric heating block 68 is installed on the inner peripheral surface of the metal pipe to be treated, the thermostat 70 controls the electric heating block 68 through the electric cable, and preheats the metal pipe through the electric heating block 68, which greatly improves the heating efficiency of the metal pipe, At the same time, the laser cutting process of metal pipe fittings is improved.

Preferably, a second fixing seat 9 is provided at the bottom of one end of the lifting plate 31 , a third mounting shaft 10 is provided between the upper end of the second adjusting arm 4 and the second fixing seat 9 , and the bottom of the other end of the lifting plate 31 is provided with a third mounting shaft 10 . Three fixing bases 11 , a fourth mounting shaft 12 is arranged between the third fixing base 11 and the upper end of the first adjusting arm 3 , a second sliding block 30 is arranged on the top surface of the third fixing base 11 , and the bottom surface of the lifting plate 31 is two Both sides are provided with second guide rails 29, and the second sliding block 30 is installed on the second guide rail 29; The bottom surface is matched more flexibly, and the lifting plate 31 is adjusted more flexibly through the first adjustment arm 3 and the second adjustment arm 4; and the vertical lifting adjustment of the clamped metal pipe is more convenient for the laser cutting machine. Laser cutting the clamped metal pipe fittings.

Preferably, a docking block 28 is provided between the upper parts of the first regulating arm 3 and the second regulating arm 4 ;

The above descriptions are only the preferred embodiments of the present invention, so all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (10)

1. A metal pipe fitting lifting jig for a laser cutting machine, comprising a base, a clamping mechanism is arranged above the base, a pair of first adjusting arms are arranged on one end of the base, and a pair of first adjusting arms are arranged on the other end of the base. Two adjusting arms; the first adjusting arm and the second adjusting arm are arranged in an X-shape; a rotating shaft is arranged between the middle part of the first adjusting arm and the second adjusting arm; It is characterized in that: one end of the base is provided with a first fixed seat, a first installation shaft is inserted between the lower end of the first adjusting arm and the first fixed seat, the other end of the base is provided with a sliding seat, and the second adjusting arm is provided with a sliding seat. A second installation shaft is inserted between the lower end of the sliding seat and the sliding seat; the bottom of the sliding seat is provided with a first sliding block, the base is provided with a first guide rail, and the first sliding block is installed on the first guide rail; There is a threaded seat, the middle of the threaded seat is provided with a threaded groove, the base is provided with a stepping motor, the front of the stepping motor is provided with a rotating shaft, the front end of the rotating shaft is provided with a tapping thread, and the tapping thread passes through the threaded groove of the threaded seat. , the tapping is connected with the thread groove of the thread seat by the thread; The clamping mechanism includes a lifting plate, and the upper ends of the first regulating arm and the second regulating arm are respectively installed on both sides of the bottom of the lifting plate; the lifting plate is provided with a clamping mechanism, and the clamping mechanism includes a main clamping seat and a pair of auxiliary clamps Take the seat, the main clipping seat and a pair of auxiliary clipping seats are arranged in a triangle, the main clipping seat and a pair of auxiliary clipping seats are installed on the lifting plate, the top of the main clipping seat is provided with a main fixing block, the main fixing block There is a main clamping block, the top of the main clamping block is provided with a main clamping groove at the position facing the outside, the auxiliary clamping seat is provided with an auxiliary fixing block, and the auxiliary fixing block is provided with an auxiliary clamping block. The top of the block is provided with a secondary clamping groove at the position facing the outside, and the secondary clamping groove is matched with the main clamping groove; the lifting plate is provided with a first hydraulic cylinder, the front part of the first hydraulic cylinder is provided with a first piston rod, and the first hydraulic cylinder is provided with a first piston rod. The front end of a piston rod is connected with the main clamping seat; a clamping cavity is formed between the main clamping block and the auxiliary clamping block. 2. The metal pipe fitting lifting jig for laser cutting machine according to claim 1, characterized in that: the bottom of the main clamping seat is provided with a main sliding block, and the bottom of the auxiliary clamping seat is provided with an auxiliary sliding block, The lifting plate is provided with a main guide rail and a pair of auxiliary guide rails, the main slider is installed on the main guide rail, and the auxiliary slider is installed on the auxiliary guide rail; the front end of the main guide rail is provided with a main limit block, and the main limit block is installed on the main slider The outer side of the block; the front end of the auxiliary guide rail is provided with an auxiliary limit block, and the auxiliary limit block is installed on the outer side of the auxiliary slider. 3. The metal pipe fitting lifting jig for laser cutting machine according to claim 2, characterized in that: the top of the main clamping seat is provided with a positioning block, the bottom of the main fixing block is provided with a positioning groove, and the positioning block is installed in the positioning slot. 4. The metal pipe fitting lifting jig for a laser cutting machine according to claim 1, wherein a docking mechanism is provided between the main clamping seat and the auxiliary clamping seat, and the docking mechanism comprises a positioning plate, The positioning plate is in the shape of a triangle, and there are connecting arms at the triangular positions of the positioning plate. One connecting arm of the positioning plate is connected with the main clamping seat, and the other two connecting arms of the positioning plate are connected with the auxiliary clamping seat. There is a positioning cylinder, the outer peripheral surface of the positioning cylinder is sleeved with a positioning disk, and the top of the positioning disk is provided with an installation column. 5 . The metal pipe fitting lifting jig for laser cutting machine according to claim 4 , wherein the triangular positions of the positioning plate are provided with clamping grooves, and the end of the connecting arm is installed in the clamping groove position. 6 . 6. The metal pipe fitting lifting jig for laser cutting machine according to claim 2, wherein the lifting plate is provided with a second hydraulic cylinder, and the front part of the second hydraulic cylinder is provided with a second piston rod, The front end of the second piston rod is provided with a guide seat, the middle part of the guide seat is provided with an opening cavity, and the front part of the guide seat is provided with a guide groove; The rear part of the main clamping seat is fixed at the position of the moving groove, and the main clamping seat is installed at the position of the guide groove; the lifting plate is provided with a second hydraulic cylinder seat, and the second hydraulic cylinder is installed on the second hydraulic cylinder seat. 7. The metal pipe fitting lifting jig for a laser cutting machine according to claim 1, wherein the lifting plate is provided with a first hydraulic cylinder seat, and the first hydraulic cylinder is mounted on the first hydraulic cylinder seat. 8. The metal pipe fitting lifting jig for a laser cutting machine according to claim 1, characterized in that: a positioning seat is provided on the base, a guide shell and a protective cylinder are provided on the top of the positioning seat, and both sides of the guide shell are provided It is an open structure, the front part of the stepping motor is connected with the front part of the protective cylinder; the rotating shaft passes through the axial position of the guide shell and the protective cylinder. 9 . The metal pipe fitting lifting jig for laser cutting machine according to claim 1 , wherein a limit seat is provided on the base, a limit block is provided on the limit seat, and a thread is provided on the upper part of the limit block. 10 . A reinforcing block is arranged between the limit seat and the limit block, the front end of the tapping thread passes through the threaded hole, and the threaded hole and the tapping thread are connected by thread. 10 . The metal pipe fitting lifting jig for laser cutting machine according to claim 1 , wherein the front end of the first guide rail is provided with a limit block, and the limit block is installed in front of the first sliding block. 11 .

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