阅读说明：本技术 一种高银钎料生产用的挤压装置 (Extrusion device of high silver brazing filler metal production usefulness ) 是由 吴斌 徐荣华 于 2021-07-27 设计创作，主要内容包括：本发明涉及钎料成型技术领域,且公开了一种高银钎料生产用的挤压装置,包括：工作台和挤压筒,所述工作台的顶部设置有安装立柱,所述挤压筒安装在安装立柱的侧面,所述挤压筒出料管的底部安装有定型管,所述定型管的表面安装有限位板。该高银钎料生产用的挤压装置,通过设置第一电机、齿轮、转盘和切割机构,挤压筒将焊丝管挤出后,启动切割装置的电动伸缩杆,电动伸缩杆的伸缩端伸出,带动第二电机和刀片移动,使刀片和焊丝管的表面接触,并对焊丝管进行切割,同时第一电机带动齿轮转动,齿轮带动转盘转动,转盘带动切割机构转动,对焊丝管的表面进行环切,截断焊丝管的同时避免挤压焊丝管的管壁,防止焊丝管的端口封闭。(The invention relates to the technical field of solder forming, and discloses an extrusion device for producing high-silver solder, which comprises: workstation and recipient, the top of workstation is provided with the installation stand, the side at the installation stand is installed to the recipient, the design pipe is installed to the bottom of recipient discharging pipe, the surface mounting of design pipe has the limiting plate. This extrusion device of high silver brazing filler metal production usefulness, through setting up first motor, the gear, carousel and cutting mechanism, the recipient extrudees the back with the welding wire pipe, start cutting device's electric telescopic handle, electric telescopic handle's flexible end stretches out, drive second motor and blade removal, make the surface contact of blade and welding wire pipe, and cut the welding wire pipe, first motor drives the gear simultaneously and rotates, the gear drives the carousel and rotates, the carousel drives cutting mechanism and rotates, the surface of welding wire pipe is circular cut, avoid extruding the pipe wall of welding wire pipe when cuting the welding wire pipe, prevent that the port of welding wire pipe from sealing.)

1. The utility model provides an extrusion device of high silver brazing filler metal production usefulness which characterized in that includes: workstation (1) and recipient (2), the top of workstation (1) is provided with installation stand (3), the side at installation stand (3) is installed in recipient (2), design pipe (4) are installed to the bottom of recipient (2) discharging pipe, the surface mounting of design pipe (4) has limiting plate (5), the inner wall of limiting plate (5) rotates and is connected with cutting mechanism (6), the surface mounting of installation stand (3) has first motor (7), gear (8) are installed to the output shaft of first motor (7), the surface of gear (8) run through limiting plate (5) and with the surface swing joint of cutting mechanism (6), mount pad (9) are installed at the top of workstation (1), the internally mounted of mount pad (9) has step motor (10), circular slot (11) have been seted up at the top of mount pad (9), the inner wall of circular slot (11) rotates and is connected with connecting plate (12), install at the top of step motor (10) connecting plate (12), dead lever (13) are installed at the top of connecting plate (12), the top of dead lever (13) sets up fixed establishment (14).

2. The extrusion device for producing the high-silver brazing filler metal according to claim 1, wherein the cutting mechanism (6) comprises a second motor (61), a blade (62), a connecting block (63), a rotary table (64) and an electric telescopic rod (65), the blade (62) is fixedly connected to the surface of an output shaft of the second motor (61), the second motor (61) is installed on the inner wall of the connecting block (63), the connecting block (63) is installed at the telescopic end of the electric telescopic rod (65), a fixing frame (15) is arranged on the surface of the electric telescopic rod (65), the electric telescopic rod (65) is installed at the bottom of the rotary table (64) through the fixing frame (15), a tooth groove is formed in the surface of the rotary table (64), and the rotary table (64) is meshed with a gear (8) through the tooth groove.

3. The extrusion device for producing the high-silver brazing filler metal according to claim 2, wherein a guide block (16) is fixedly connected to the top of the rotary table (64), an annular guide groove (17) is formed in the top of the inner wall of the limiting plate (5), and the guide block (16) is slidably connected to the inner wall of the annular guide groove (17).

4. The extrusion device for producing the high-silver solder according to claim 1, wherein the fixing mechanism (14) comprises a positioning block (141), a round rod (142) and two expansion blocks (143), the positioning block (141) is fixedly connected to the top of the fixing rod (13), the round rod (142) is fixedly connected to the inner wall of the positioning block (141), the number of the expansion blocks (143) is two, and the two expansion blocks (143) are both slidably connected to the surface of the round rod (142).

5. The extrusion device for producing the high-silver solder according to claim 4, wherein the spring (18) is sleeved on the surface of the round rod (142), and the two expansion blocks (143) are respectively and fixedly connected to two ends of the spring (18).

6. The extrusion device for producing the high-silver solder according to claim 4, wherein an anti-slip sheet (19) is fixedly connected to the surface of the expansion block (143), and anti-slip lines are formed on the surface of the anti-slip sheet (19).

7. The extrusion device of a high silver brazing filler metal production usefulness according to claim 1, characterized in that, the surface mounting of sizing pipe (4) has cooling tube (20), cooling tube (20) are located the top of limiting plate (5), the surface of cooling tube (20) is provided with inlet tube and outlet pipe respectively.

8. The extrusion apparatus for producing high silver solder according to claim 1, wherein the bottom of the connecting plate (12) is movably embedded with a ball (21), and the surface of the ball (21) is in rolling connection with the bottom of the inner wall of the circular groove (11).

9. The extrusion device for producing the high-silver brazing filler metal according to claim 1, wherein a mounting rod (22) is fixedly connected to the top of the workbench (1), and a shifting plate (23) is fixedly connected to the surface of the mounting rod (22).

10. The extrusion apparatus for manufacturing a high silver solder according to claim 1, wherein the number of the fixing bars (13) is plural, and the plural fixing bars (13) are distributed in a circular array with the center of the array passing through the connecting plate (12) as the center of the array.

Technical Field

The invention relates to the technical field of solder forming, in particular to an extrusion device for producing high-silver solder.

Background

The brazing filler metal is a filler added in or beside a gap for realizing the combination of two materials or parts, the brazing filler metal is a filling material for forming a welding line during brazing, the melting point of the brazing filler metal is necessarily lower than that of a welding material, the brazing filler metal is suitable for welding precise, complex and multi-collar seams and dissimilar materials, the brazing filler metal comprises tin-based brazing filler metal, lead-based brazing filler metal, zinc-based brazing filler metal and the like according to the components, and the brazing filler metal comprises aluminum-based brazing filler metal, silver-based brazing filler metal, copper-based brazing filler metal, nickel-based brazing filler metal and the like.

The brazing filler metal is used in cooperation with a brazing flux when used, the common silver-based brazing filler metal can be extruded into a welding wire pipe when being processed, then the brazing flux is extruded into the welding wire pipe, the brazing flux is not easy to volatilize, the existing welding wire pipe is cut off by a pair of shearing pliers generally, the shearing pliers can extrude the pipe wall of the welding wire pipe when cutting off the welding wire pipe, the welding wire pipe is closed, the brazing flux is not easy to inject subsequently, the welding wire pipe is high in temperature and easy to deform when being extruded, the extruded brazing filler metal pipe is unqualified, and subsequent processing cannot be carried out.

Disclosure of Invention

In view of the defects of the prior art, the invention provides an extrusion device for producing high-silver solder, which solves the problems mentioned in the background.

The invention provides the following technical scheme: an extrusion device for producing high-silver solder, comprising: the extrusion device comprises a workbench and an extrusion cylinder, wherein the top of the workbench is provided with a mounting upright post, the extrusion cylinder is arranged on the side surface of the mounting upright post, a shaping pipe is arranged at the bottom of the discharging pipe of the extrusion container, a limiting plate is arranged on the surface of the shaping pipe, the inner wall of the limiting plate is rotatably connected with a cutting mechanism, the surface of the mounting upright post is provided with a first motor, the output shaft of the first motor is provided with a gear, the surface of the gear penetrates through the limiting plate and is movably connected with the surface of the cutting mechanism, the top of the workbench is provided with a mounting seat, the inside of the mounting seat is provided with a stepping motor, the top of the mounting seat is provided with a circular groove, the inner wall of the circular groove is rotationally connected with a connecting plate, the connecting plate is arranged at the top of the stepping motor, the top of connecting plate is installed the dead lever, the top of dead lever sets up fixed establishment.

Preferably, cutting mechanism includes second motor, blade, connecting block, carousel and electric telescopic handle, blade fixed connection is on the surface of second motor output shaft, the inner wall at the connecting block is installed to the second motor, the flexible end at electric telescopic handle is installed to the connecting block, electric telescopic handle's surface is provided with the mount, electric telescopic handle passes through the mount and installs the bottom at the carousel, the tooth's socket has been seted up on the surface of carousel, the carousel passes through tooth's socket and gear engagement.

Preferably, the top fixedly connected with of carousel leads the position piece, annular guide groove has been seted up at the top of limiting plate inner wall, lead position piece sliding connection at the inner wall in annular guide groove.

Preferably, fixed establishment includes locating piece, round bar and bloated piece, locating piece fixed connection is at the top of dead lever, round bar fixed connection is at the inner wall of locating piece, the quantity of bloated piece is two, two the equal sliding connection of bloated piece is on the surface of round bar.

Preferably, the surface of the round rod is sleeved with a spring, and the two expansion blocks are respectively and fixedly connected to two ends of the spring.

Preferably, the surface of the expansion block is fixedly connected with an anti-slip sheet, and anti-slip lines are formed in the surface of the anti-slip sheet.

Preferably, the surface mounting of design pipe has the cooling tube, the cooling tube is located the top of limiting plate, the surface of cooling tube is provided with inlet tube and outlet pipe respectively.

Preferably, the bottom of the connecting plate is movably embedded with a ball, and the surface of the ball is in rolling connection with the bottom of the inner wall of the circular groove.

Preferably, the top of the workbench is fixedly connected with an installation rod, and the surface of the installation rod is fixedly connected with a shifting plate.

Preferably, the number of the fixing rods is multiple, and the fixing rods are distributed in an annular array by taking the center passing through the connecting plate as an array center.

Compared with the prior art, the invention has the following beneficial effects:

1. this extrusion device of high silver brazing filler metal production usefulness, through setting up first motor, the gear, carousel and cutting mechanism, the recipient extrudees the back with the welding wire pipe, start cutting device's electric telescopic handle, electric telescopic handle's flexible end stretches out, drive second motor and blade removal, make the surface contact of blade and welding wire pipe, and cut the welding wire pipe, first motor drives the gear simultaneously and rotates, the gear drives the carousel and rotates, the carousel drives cutting mechanism and rotates, the surface of welding wire pipe is circular cut, avoid extruding the pipe wall of welding wire pipe when cuting the welding wire pipe, prevent that the port of welding wire pipe from sealing.

2. This extrusion device of high silver brazing filler metal production usefulness, through setting up stock pipe and cooling tube, the brazing filler metal is extruded from the discharging pipe of recipient, and the welding wire pipe gets into stock pipe, retrains and stereotypes the shape of welding wire pipe through the inner wall of stock pipe, lets in the coolant liquid from the inlet tube of cooling tube simultaneously, and the cooling tube cools down stock pipe and the inside welding wire pipe of stock pipe, and the welding wire pipe is stereotyped with higher speed, and the shape changes when avoiding the welding wire pipe to extrude the recipient.

3. This extrusion device of high silver brazing filler metal production usefulness, through setting up fixed establishment and spring, the welding wire pipe is through the sizing pipe, reach the position of fixed establishment locating piece until the welding wire pipe, the inner wall of welding wire pipe and the surface contact and the extrusion bloated piece of bloated piece, two bloated pieces receive the extrusion, compress the spring, the bloated piece is pegged graft to the inner wall of welding wire pipe after, the spring stretches back, promote the bloated piece and support the inner wall at the welding wire pipe, fix the position of welding wire pipe, the welding wire pipe takes place to rock when avoiding cutting mechanism to cut.

4. This extrusion device of high silver brazing filler metal production usefulness, through setting up step motor and connecting plate, after cutting mechanism has cut a welding wire pipe, start step motor, step motor's output shaft rotates, drives the connecting plate and rotates, and the connecting plate rotates and drives the dead lever and rotate, and the dead lever drives next fixed establishment motion to the below of stereotyping pipe, and the extrusion tube can continue work and extrude the welding wire pipe, subtracts short dwell time, has improved work efficiency.

Drawings

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

FIG. 2 is a schematic side sectional view of the cutting mechanism of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic side sectional view of the fixing mechanism of the present invention;

FIG. 5 is a schematic view of a connection plate according to the present invention;

fig. 6 is a schematic diagram of the internal structure of the limiting plate of the invention.

In the figure: 1. a work table; 2. an extrusion cylinder; 3. mounting the upright post; 4. shaping pipes; 5. a limiting plate; 6. a cutting mechanism; 61. a second motor; 62. a blade; 63. connecting blocks; 64. a turntable; 65. an electric telescopic rod; 7. a first motor; 8. a gear; 9. a mounting seat; 10. a stepping motor; 11. a circular groove; 12. a connecting plate; 13. fixing the rod; 14. a fixing mechanism; 141. positioning blocks; 142. a round bar; 143. expanding blocks; 15. a fixed mount; 16. a guide block; 17. an annular guide groove; 18. a spring; 19. anti-slip sheets; 20. a cooling tube; 21. a ball bearing; 22. mounting a rod; 23. and (5) dialing a plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, an extrusion apparatus for producing a high silver solder includes: the welding wire fixing device comprises a workbench 1 and an extrusion cylinder 2, wherein the top of the workbench 1 is provided with a mounting upright post 3, the extrusion cylinder 2 is arranged on the side surface of the mounting upright post 3, the bottom of a discharge pipe of the extrusion cylinder 2 is provided with a shaping pipe 4, brazing filler metal is extruded from the discharge pipe of the extrusion cylinder 2 to form a tubular welding wire pipe, the welding wire pipe extruded from the extrusion cylinder 2 enters the shaping pipe 4, the shaping pipe 4 restrains and shapes the shape of the welding wire pipe through the inner wall to avoid the change of the shape of the welding wire pipe, the surface of the shaping pipe 4 is provided with a limiting plate 5, the inner wall of the limiting plate 5 is rotatably connected with a cutting mechanism 6, the surface of the mounting upright post 3 is provided with a first motor 7, an output shaft of the first motor 7 is provided with a gear 8, the surface of the gear 8 penetrates through the limiting plate 5 and is movably connected with the surface of the cutting mechanism 6, the welding wire pipe passes through the shaping pipe 4 to reach a fixed length, and is butted with a fixing mechanism 14 and is fixed in position through the fixing mechanism 14, starting a first motor 7, wherein an output shaft of the first motor 7 rotates to drive a gear 8 to rotate, and a cutting mechanism 6 is driven to rotate through the gear 8, so as to achieve the purpose of performing circular cutting on a welding wire pipe and avoid the deformation of the pipe wall of the welding wire pipe in the cutting process, a mounting seat 9 is mounted at the top of a workbench 1, a stepping motor 10 is mounted inside the mounting seat 9, a circular groove 11 is formed in the top of the mounting seat 9, a connecting plate 12 is rotatably connected to the inner wall of the circular groove 11, the connecting plate 12 is mounted at the top of the stepping motor 10, a fixing rod 13 is mounted at the top of the connecting plate 12, a fixing mechanism 14 is arranged at the top of the fixing rod 13, after one welding wire pipe is cut by the cutting mechanism 6, the stepping motor 10 is started, the output shaft of the stepping motor 10 rotates to drive the connecting plate 12 to rotate, the connecting plate 12 rotates to drive the fixing rod 13 to rotate, and the fixing rod 13 drives the next fixing mechanism 14 to move to the lower part of a shaping pipe 4, the extrusion cylinder 2 can continue to work to extrude a wire tube.

Wherein; the cutting mechanism 6 comprises a second motor 61, a blade 62, a connecting block 63, a rotary table 64 and an electric telescopic rod 65, the blade 62 is fixedly connected to the surface of the output shaft of the second motor 61, the second motor 61 is installed on the inner wall of the connecting block 63, the connecting block 63 is installed at the telescopic end of the electric telescopic rod 65, a fixing frame 15 is arranged on the surface of the electric telescopic rod 65, the electric telescopic rod 65 is installed at the bottom of the rotary table 64 through the fixing frame 15, a tooth groove is formed in the surface of the rotary table 64, the rotary table 64 is meshed with a gear 8 through the tooth groove, the first motor 7 is started, the output shaft of the first motor 7 rotates to drive the gear 8 to rotate, the gear 8 is meshed with the rotary table 64 through the tooth groove to drive the rotary table 64 to rotate, a welding wire tube is extruded by the extrusion cylinder 2, and after the position of the welding wire tube is fixed, the second motor 61 is started, the output shaft of the second motor 61 rotates to drive the blade 62 to rotate, the electric telescopic rod 65 is started, electric telescopic handle 65's flexible end stretches out, drive second motor 61 and blade 62 and remove, make the surface contact of blade 62 and welding wire pipe, and cut the welding wire pipe, first motor 7 drives gear 8 simultaneously and rotates, gear 8 drives carousel 64 and rotates, carousel 64 drives and rotates electric telescopic handle 65, second motor 61 and blade 62 rotate around the welding wire pipe, the surface of welding wire pipe is cut all around through blade 62, avoid the pipe wall of extrusion welding wire pipe when cuting the welding wire pipe, prevent that the port of welding wire pipe from sealing.

Wherein; the top fixedly connected with of carousel 64 leads a piece 16, annular guide groove 17 has been seted up at the top of the 5 inner walls of limiting plate, lead 16 sliding connection of piece at the inner wall of annular guide groove 17, carousel 64 drives guide piece 16 when rotating and rotates, guide piece 16 slides at the inner wall of annular guide groove 17, annular guide groove 17 is spacing to guide piece 16, thereby it is spacing to carousel 64, lead the position to carousel 64 simultaneously, make the steady rotation of carousel 64, make blade 62 can not produce when cutting the welding wire pipe and rock.

Wherein; fixing mechanism 14 includes locating piece 141, round bar 142 and bloated piece 143, locating piece 141 fixed connection is at the top of dead lever 13, round bar 142 fixed connection is at the inner wall of locating piece 141, the quantity of bloated piece 143 is two, the equal sliding connection of two bloated pieces 143 is on the surface of round bar 142, spring 18 has been cup jointed on the surface of round bar 142, two bloated pieces 143 are fixed connection respectively at the both ends of spring 18, the welding wire pipe is through sizing tube 4, until the welding wire pipe reachs the position of locating piece 141, the inner wall of welding wire pipe and the surface contact of bloated piece 143, make bloated piece 143 peg graft to the inner wall of welding wire pipe, spring 18 promotes bloated piece 143 and supports the inner wall at the welding wire pipe, fix the position of welding wire pipe, the welding wire pipe takes place to rock when avoiding cutting mechanism 6 to cut.

Wherein; the anti-slip sheet 19 is fixedly connected to the surface of the expansion block 143, anti-slip lines are formed in the surface of the anti-slip sheet 19, when the spring 18 stretches back, the expansion block 143 is pushed to move towards the inner wall of the welding wire pipe, the expansion block 143 presses the anti-slip sheet 19 against the inner wall of the welding wire pipe, relative sliding between the expansion block 143 and the welding wire pipe is prevented, the anti-slip lines formed in the surface of the anti-slip sheet 19 increase friction between the anti-slip sheet 19 and the inner wall of the welding wire pipe, and the welding wire pipe is prevented from being separated from the surface of the expansion block 143.

Wherein; the surface mounting of the sizing pipe 4 has the cooling tube 20, the cooling tube 20 is located limiting plate 5's top, the surface of cooling tube 20 is provided with inlet tube and outlet pipe respectively, inlet tube and outlet pipe are linked together with cooling tube 20, the inlet tube from cooling tube 20 lets in the coolant liquid, behind the coolant liquid absorbed heat, discharging from the outlet pipe, retrain through the shape of sizing pipe 4 butt welding wire pipe, the inlet tube from cooling tube 20 lets in the coolant liquid simultaneously, cooling tube 20 cools down sizing pipe 4 and the inside welding wire pipe of sizing pipe 4, weld wire pipe is stereotyped with higher speed, the shape changes when avoiding the welding wire pipe to extrude recipient 2.

Wherein; ball 21 is movably inlayed in the bottom of connecting plate 12, and ball 21's surface and the bottom roll connection of circular slot 11 inner wall, connecting plate 12 pass through ball 21 roll connection at the inner wall of circular slot 11, reduce connecting plate 12 at the gliding frictional force of circular slot 11 inner wall, make the steady rotation of connecting plate 12, reduce the resistance that connecting plate 12 received in circular slot 11 internal rotation.

Wherein; the top fixedly connected with installation pole 22 of workstation 1, the fixed surface of installation pole 22 is connected with dials board 23, drives fixing mechanism 14 and welding wire pipe at connecting plate 12 and rotates to dialling board 23 position department, and connecting plate 12 drives fixing mechanism 14 and continues to remove, and the welding wire pipe is with dialling the surface contact of board 23, dials board 23 and carries on spacingly to the welding wire pipe, and the welding wire pipe can not move with fixing mechanism 14 together, makes the welding wire pipe break away from the top of fixing mechanism 14.

Wherein; the quantity of dead lever 13 is a plurality of, a plurality of dead levers 13 use the center through connecting plate 12 to be the distribution of annular array as the array center, set up a plurality of dead levers 13 and be convenient for install fixed establishment 14, after cutting mechanism 6 has cut a welding wire pipe, start step motor 10, step motor 10's output shaft rotates, drive connecting plate 12 and rotate, connecting plate 12 drives dead lever 13 and rotates, dead lever 13 rotates and drives next locating piece 141 to the below of sizing pipe 4, extrusion cylinder 2 can continue work and extrude the welding wire pipe, reduce dwell time, the work efficiency is improved.

The working principle is that the extrusion cylinder 2 extrudes the brazing filler metal into a tubular welding wire tube, the welding wire tube enters the shaping tube 4 after being extruded, the shaping tube 4 can restrain the shape of the welding wire tube extruded from the extrusion cylinder 2, meanwhile, cooling liquid is introduced from a water pipe of the cooling tube 20, the cooling tube 20 cools the shaping tube 4 and the welding wire tube inside the shaping tube 4, the shaping of the welding wire tube is accelerated, the shape change of the welding wire tube when being extruded out of the extrusion cylinder 2 is avoided, so as to ensure the qualification of products, the welding wire tube passes through the shaping tube 4 until the welding wire tube reaches the position of the positioning block 141, the inner wall of the welding wire tube is in contact with the surface of the expansion block 143, so that the expansion block 143 is inserted into the inner wall of the welding wire tube, the spring 18 pushes the expansion block 143 to abut against the inner wall of the welding wire tube to fix the position of the welding wire tube, the welding wire tube is prevented from shaking when the cutting mechanism 6 cuts, and when the expansion block 143 abuts against the inner wall of the welding wire tube, the anti-skid sheet 19 is pressed against the inner wall of the welding wire tube, the expansion block 143 and the welding wire pipe are prevented from sliding relatively, the anti-slip threads formed on the surface of the anti-slip sheet 19 can increase the friction force between the anti-slip sheet 19 and the inner wall of the welding wire pipe, so that the welding wire pipe is not easy to separate from the surface of the expansion block 143, after the position of the welding wire pipe is fixed, the second motor 61 is started, the output shaft of the second motor 61 rotates to drive the blade 62 to rotate, the electric telescopic rod 65 is started, the telescopic end of the electric telescopic rod 65 extends out to drive the second motor 61 and the blade 62 to approach the welding wire pipe, so that the blade 62 contacts with the surface of the welding wire pipe and cuts the welding wire pipe, the first motor 7 is started at the same time, the first motor 7 drives the gear 8 to rotate, the gear 8 drives the rotary table 64 to rotate, the rotary table 64 drives the guide block 16 to rotate when the rotary table 64 rotates, the guide block 16 slides on the inner wall of the annular guide groove 17 to guide the rotary table 64, so that the rotary table 64 rotates more stably, and the rotary table 64 drives the electric telescopic rod 65 to rotate, The second motor 61 and the blade 62 rotate around the welding wire tube, the blade 62 performs circular cutting on the surface of the welding wire tube, the welding wire tube is cut off, meanwhile, the tube wall of the welding wire tube is prevented from being extruded, the port of the welding wire tube is prevented from being closed, the brazing flux is conveniently injected into the welding wire tube subsequently, after the cutting mechanism 6 cuts one welding wire tube, the stepping motor 10 is started, the output shaft of the stepping motor 10 rotates to drive the connecting plate 12 to rotate, the connecting plate 12 drives the fixing mechanism 14 and the welding wire tube to rotate to the position of the poking plate 23, the connecting plate 12 drives the fixing mechanism 14 to continue to move, the welding wire tube is in contact with the surface of the poking plate 23, the poking plate 23 limits the welding wire tube, the welding wire tube cannot move together with the fixing mechanism 14, the welding wire tube is separated from the top of the fixing mechanism 14, the connecting plate 12 rotates to drive the positioning block 141 separated from the welding wire tube to move to the lower part of the shaping tube 4, the extrusion cylinder 2 can continue to extrude the welding wire tube, the pause time is shortened, and the working efficiency is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.