CN113478266A

CN113478266A - Positioning device used in metal cutting

Info

Publication number: CN113478266A
Application number: CN202111029015.7A
Authority: CN
Inventors: 陆卫东
Original assignee: Nantong Turbo Metallurgical Environmental Protection Equipment Co ltd
Current assignee: Nantong Turbo Metallurgical Environmental Protection Equipment Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2021-10-08
Anticipated expiration: 2041-09-03
Also published as: CN113478266B

Abstract

The invention relates to the field of metal material processing, in particular to a positioning device for metal cutting, which comprises a positioning base, wherein a top plate is arranged above the positioning base, a positioning column is arranged between the positioning base and the top plate, the bottom of the positioning column is fixedly connected with the edge of the positioning base, and the other end of the positioning column penetrates through the top plate and is in sliding connection with the top plate. The positioning device for metal cutting provided by the invention solves the problems that when a metal pipe is fixed, the surface of a tubular metal material is deformed due to too large fixing force, and when the fixing force is too small, the tubular metal material is easy to shake or even roll, so that the fixing device is dangerous, an ordinary fixing device can only be suitable for the caliber of the tubular metal material with fixed size, when the caliber of the tubular metal material is changed, the fixing device needs to be readjusted to adapt to different calibers, the operation is complex, and when the caliber of the tubular metal material needs to be changed frequently, the working efficiency is low.

Description

Positioning device used in metal cutting

Technical Field

The invention relates to the field of metal material processing equipment, in particular to a positioning device used in metal cutting.

Background

Metal cutting is a material removal additive forming method in metal forming processes, and still accounts for a large proportion of the current mechanical manufacturing.

In the cutting process, the fixing of metal materials is very important, especially tubular materials, the surface of the tubular metal materials is deformed due to too large fixing force, the fixing force is too small, the tubular metal materials are easy to shake or even roll when being cut, the fixing device is very dangerous, an ordinary fixing device can only be suitable for the caliber of the tubular metal materials with fixed size, when the caliber of the tubular metal materials is changed, the fixing device needs to be readjusted to adapt to different calibers, the operation is complex, especially when the caliber of the tubular metal materials needs to be changed frequently, and the working efficiency is not high.

Disclosure of Invention

The invention aims to provide a positioning device for metal cutting, which solves the problems that when a metal pipe is fixed, the surface of a tubular metal material is deformed due to too high fixing force, the tubular metal material is easy to shake or even roll when the fixing force is too low, the tubular metal material is dangerous, an ordinary fixing device can only be suitable for the caliber of the tubular metal material with fixed size, when the caliber of the tubular metal material is changed, the fixing device needs to be readjusted to adapt to different calibers, the operation is complex, and when the caliber of the tubular metal material needs to be changed frequently, the working efficiency is low.

In order to achieve the purpose, the invention provides the following technical scheme:

a positioning device used in metal cutting comprises a positioning base, a top plate is arranged above the positioning base, a positioning column is arranged between the positioning base and the top plate, the bottom of the positioning column is fixedly connected with the edge of the positioning base, the other end of the positioning column penetrates through the top plate and is in sliding connection with the top plate, a plurality of groups of pressure rods are fixedly connected with the bottom of the top plate, each group comprises two pressure rods, and the bottom ends of the pressure rods are fixedly connected with a pressing block; the upper part of the positioning base is provided with a groove, a plurality of rows of supporting mechanisms are vertically arranged in the groove, each row comprises a plurality of independent supporting mechanisms, the bottom of each supporting mechanism is connected with the inner wall of the groove, and the top of each supporting mechanism is rotatably connected with a deformation block;

the bottom of the groove is provided with a plurality of sliding grooves corresponding to the supporting mechanism, the sliding grooves are internally and slidably connected with sliding blocks, the tops of the sliding blocks are fixedly connected with the supporting mechanism, the supporting mechanism is slidably connected with the side wall of each sliding groove, the bottoms of the sliding blocks are fixedly connected with extrusion springs, and the extrusion springs are fixedly connected with the bottoms of the sliding grooves.

Preferably, the supporting mechanism comprises a supporting rod positioned at the bottom, the top of the supporting rod is fixedly connected with a first piston sleeve, a first piston is installed in the first piston sleeve, the top of the first piston is fixedly connected with a sliding rod, the top of the sliding rod is rotatably connected with a rotating block, and a reset spring is fixedly connected between the bottom of the first piston and the top of the supporting rod; the transverse groove is formed in the upper portion of the supporting rod, a transverse rod sleeve is fixedly mounted in the transverse groove, a transverse rod is connected in the transverse rod sleeve in a sliding mode, a second piston is fixedly mounted at one end, close to the supporting rod, of the transverse rod, and a friction block is fixedly mounted at one end, far away from the supporting rod, of the transverse rod.

Preferably, one side fixedly connected with that the second piston is far away from the horizontal pole promotes the spring, promotes the spring top and has seted up a plurality of air vent, and the horizontal pole cover is installed in one side that the air vent is close to the clutch blocks.

Preferably, the upper part of the support rod of each row of middle support mechanism is not provided with a transverse groove, and does not comprise a transverse rod sleeve and a transverse rod, and the top of the support rod is directly and fixedly connected with the slide rod; and the friction block of each rest support mechanism is abutted with the support mechanism close to the middle direction.

Preferably, the top of the rotating block is provided with a rubber block, and a cavity is arranged between the rubber block and the rotating block.

Preferably, the equal fixedly connected with gasbag in the slider below of each row middle supporting mechanism bottom, the extrusion spring housing of its below is established in the gasbag outside, and the gasbag both sides are connected with the trachea, and the spout in the middle of each row link up two spouts of its both sides through the trachea, and the air cavity has been seted up to middle spout below, and the air channel that is used for lining up the air cavity is seted up to each row and two adjacent spout bottoms of middle spout.

Preferably, the bottom parts of two adjacent sliding grooves of each row and the middle sliding groove are fixedly connected with stop blocks, and the stop blocks are matched with the air pipes.

Preferably, the briquetting includes the diaphragm, the vertical fixedly connected with fixed plate in diaphragm bottom, and fixed plate bottom sliding connection has the slide, and slide bottom fixedly connected with leather sheath, the one end fixed connection of fixed plate is kept away from to the leather sheath other end and diaphragm, and two fixed plates on two dogs of every group are for keeping away from the setting mutually.

Preferably, a threaded hole is formed in the fixing plate, a bolt is installed in the threaded hole, and one end of the bolt is abutted to the sliding plate.

The invention has the beneficial effects that:

1. when the metal tube contacts with the deformation block at the middle part, the rubber block is extruded at the bottom of the metal tube, and because a cavity is arranged between the rubber block and the bottom rotating block, the rubber block can adapt to the shape of the metal tube, so that the metal tube is extruded and deformed when pressure is avoided to be large, and when the metal tube extrudes the deformation blocks at other positions, the deformation blocks at other positions can rotate around the sliding rod below the metal tube, so that the metal tube is further protected due to the better shape of the metal tube.

2. When the metal pipe moves downwards, the friction blocks prevent the relative displacement between the supporting mechanisms, and each deformation block contacted with the metal pipe can be relatively fixed after being matched with the shape of the metal pipe, so that the stress of the metal pipe is more uniformly distributed on the surface of the metal pipe, and the possibility of deformation of the metal pipe is reduced.

3. When two supporting mechanism of middle supporting mechanism both sides move down the certain distance, control two bracing pieces and move down, promote slider and dog and move down, the dog moves down and plugs up the trachea, thereby prevent that middle supporting mechanism from continuing to move down, fix all supporting mechanism, and then fixed metal pipe, accomplish when the shape of the adaptation metal pipe of deformation piece and after moving down a section distance, fix metal pipe and all supporting mechanism, make this device can adapt to the metal pipe of multiple different bores, when changing the metal pipe of different bores, do not need adjustment fixing device, increase work efficiency.

4. Can adjust the height of slide through unscrewing the bolt on the fixed plate before the cutting to the angle of adjustment leather sheath, and then the direction of adjustment leather sheath to the tubular metal resonator pressure, cut the tubular metal resonator from different directions, the atress of tubular metal resonator can change, and when the tubular metal resonator is cut at different angles, to the atress difference of tubular metal resonator, also adjust the fixed power of tubular metal resonator, further prevent that the tubular metal resonator from taking place to shake or the displacement and influence the cutting process.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a cross-sectional view of the positioning base of fig. 1 according to the present invention.

Fig. 3 is a cross-sectional view of the support mechanism of fig. 2 of the present invention.

FIG. 4 is an enlarged view of the portion A of FIG. 2 according to the present invention.

FIG. 5 is an enlarged view of the portion B of FIG. 3 according to the present invention.

FIG. 6 is a cross-sectional view of the compact of FIG. 1 of the present invention.

In the figure: 1. positioning a base; 2. a top plate; 3. a positioning column; 4. a deformation block; 5. a support mechanism; 6. a pressure lever; 7. briquetting; 8. a groove; 9. a slider; 10. an air bag; 11. a support bar; 12. a cross bar sleeve; 13. a cross bar; 14. a friction block; 15. a first piston sleeve; 16. a first piston; 17. a slide bar; 18. rotating the block; 19. a rubber block; 20. a return spring; 21. a second piston; 22. a push spring; 23. a vent hole; 24. a compression spring; 25. an air tube; 26. a stopper; 27. a vent channel; 28. an air cavity; 29. a transverse plate; 30. a fixing plate; 31. a slide plate; 32. a leather sheath; 33. and (4) bolts.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.

As shown in fig. 1-6, the positioning device for metal cutting according to the present invention comprises a positioning base 1, a top plate 2 is disposed above the positioning base 1, a positioning column 3 is installed between the positioning base 1 and the top plate 2, the bottom of the positioning column 3 is fixedly connected to the edge of the positioning base 1, the other end of the positioning column 3 penetrates through the top plate 2 and is slidably connected to the top plate 2, the bottom of the top plate 2 is fixedly connected to a plurality of groups of pressing rods 6, each group includes two pressing rods 6, and the bottom end of each pressing rod 6 is fixedly connected to a pressing block 7; a groove 8 is formed in the upper portion of the positioning base 1, a plurality of rows of supporting mechanisms 5 are vertically arranged in the groove 8, each row comprises a plurality of independent supporting mechanisms 5, the bottom of each supporting mechanism 5 is connected with the inner wall of the corresponding groove 8, and the top of each supporting mechanism 5 is rotatably connected with a deformation block 4;

a plurality of spout has been seted up to 8 bottoms of recess corresponding supporting mechanism 5, and sliding connection has slider 9 in the spout, and 9 tops of slider and 5 fixed connection of supporting mechanism, and supporting mechanism 5 and spout lateral wall sliding connection, 9 bottom fixedly connected with extrusion spring 24 of slider, extrusion spring 24 and spout bottom fixed connection.

As a technical optimization scheme of the invention, the supporting mechanism 5 comprises a supporting rod 11 positioned at the bottom, the top of the supporting rod 11 is fixedly connected with a first piston sleeve 15, a first piston 16 is installed in the first piston sleeve 15, the top of the first piston 16 is fixedly connected with a slide rod 17, the top of the slide rod 17 is rotatably connected with a rotating block 18, and a return spring 20 is fixedly connected between the bottom of the first piston 16 and the top of the supporting rod 11; the transverse groove has been seted up on bracing piece 11 upper portion, and fixed mounting has a horizontal pole cover 12 in the transverse groove, and sliding connection has horizontal pole 13 in horizontal pole cover 12, and the one end fixed mounting that horizontal pole 13 is close to bracing piece 11 has second piston 21, and the one end fixed mounting that bracing piece 11 was kept away from to horizontal pole 13 has clutch blocks 14.

As a technical optimization scheme of the invention, one side of the second piston 21 far away from the cross rod 13 is fixedly connected with a pushing spring 22, a plurality of vent holes 23 are formed above the pushing spring 22, and the cross rod sleeve 12 is installed on one side of the vent holes 23 close to the friction block 14. When the middle supporting mechanism 5 moves downwards to a certain distance, two sides of the metal pipe begin to extrude the left and right supporting mechanisms 5 adjacent to the middle supporting mechanism 5, at the moment, the left and right deformation blocks 4 rotate around the supporting mechanism 5 below the middle supporting mechanism to adapt to the radian of the metal pipe and further cling to the surface of the metal pipe, the left and right deformation blocks 4 press the sliding rod 17 and the first piston 16 below the left and right deformation blocks downwards, the first piston 16 pushes gas below the first piston into the transverse groove at the upper part of the supporting rod 11 through the vent hole 23, the gas pushes the second piston 21, the transverse rod 13 and the friction block 14 towards the direction close to the middle supporting mechanism 5 of each row so that the friction block 14 is abutted against the middle supporting mechanism 5 of each row to fix the middle supporting mechanism 5 and the left and right supporting mechanisms 5 thereof so as to prevent relative displacement between the supporting mechanisms 5, and the deformation block 4 contacted with the metal pipe is relatively fixed after being matched with the shape of the metal pipe, the stress of the metal pipe is distributed on the surface of the metal pipe more uniformly, so that the possibility of deformation of the metal pipe is reduced;

as a technical optimization scheme of the invention, the upper part of the support rod 11 of each row of middle support mechanism 5 is not provided with a transverse groove, and does not comprise a transverse rod sleeve 12 and a transverse rod 13, and the top of the support rod 11 is directly and fixedly connected with a sliding rod 17; the friction block 14 of each of the remaining support mechanisms 5 abuts against the support mechanism 5 near the center direction thereof.

As a technical optimization scheme of the invention, the top of the rotating block 18 is provided with a rubber block 19, and a cavity is arranged between the rubber block 19 and the rotating block 18. When the metal pipe contacts with the deformation block 4 at the middle part, the rubber block 19 is extruded at the bottom of the metal pipe, and the rubber block 19 can adapt to the shape of the metal pipe due to the cavity arranged between the rubber block 19 and the bottom rotating block 18, so that the metal pipe is prevented from being extruded and deformed when the pressure is large.

As a technical optimization scheme of the invention, an air bag 10 is fixedly connected below a sliding block 9 at the bottom of each row of middle supporting mechanism 5, an extrusion spring 24 below the air bag 10 is sleeved outside the air bag 10, air pipes 25 are connected at two sides of the air bag 10, a sliding chute in the middle of each row penetrates through two sliding chutes at two sides of the sliding chute through the air pipes 25, an air cavity 28 is arranged below the middle sliding chute, and a vent groove 27 for penetrating through the air cavity 28 is arranged at the bottom of each row of two sliding chutes adjacent to the middle sliding chute.

As a technical optimization scheme of the invention, the bottom parts of two sliding chutes adjacent to each row of the middle sliding chute are fixedly connected with a stop 26, and the stop 26 is matched with the air pipe 25. After two sliders 9 adjacent to the middle slider 9 in each row move downwards for a certain distance, the air pipe 25 is blocked by the stop 26, and the middle slider 9 is fixed.

As a technical optimization scheme of the invention, the press block 7 comprises a transverse plate 29, the bottom of the transverse plate 29 is vertically and fixedly connected with a fixed plate 30, the bottom of the fixed plate 30 is slidably connected with a sliding plate 31, the bottom of the sliding plate 31 is fixedly connected with a leather sheath 32, the other end of the leather sheath 32 is fixedly connected with one end of the transverse plate 29 far away from the fixed plate 30, and the two fixed plates 30 on each group of two stop blocks 26 are arranged far away from each other.

As a technical optimization scheme of the invention, a threaded hole is formed in the fixing plate 30, a bolt 33 is installed in the threaded hole, and one end of the bolt 33 is abutted against the sliding plate 31. Can be through unscrewing the bolt 33 on the fixed plate 30 before the cutting, adjust the height of slide 31 to the angle of adjustment leather sheath 32, and then the adjustment leather sheath 32 is to the direction of tubular metal resonator pressure, cuts the tubular metal resonator from different directions, and the atress of tubular metal resonator can change, and when different angles cut the tubular metal resonator, it is different to the atress of tubular metal resonator, also adjusts the fixed power of tubular metal resonator, further prevents that the tubular metal resonator from taking place shake or displacement and influence the cutting process.

The working principle is as follows: when in use, the positioning device is firstly fixed in front of the cutting station and matched with the cutting station; then, the metal pipe is placed in the groove 8 along the direction of the positioning base 1, so that the middle part of the metal pipe extrudes the supporting mechanism 5 and the deformation block 4 at the middle position of each row; the top plate 2 is pressed downwards, the metal pipe is pushed downwards through the pressure rod 6 and the pressure block 7, when the metal pipe is contacted with the deformation block 4 at the middle part, the rubber block 19 is extruded at the bottom of the metal pipe, and the rubber block 19 can adapt to the shape of the metal pipe due to the cavity arranged between the rubber block 19 and the bottom rotating block 18, so that the metal pipe is prevented from being extruded and deformed when the pressure is high; four rows of supporting mechanisms 5 are vertically arranged in the groove 8, and each row comprises seven independent supporting mechanisms 5;

the metal tube moves downwards, the sliding rod 17 is pushed downwards through the deformation block 4, the upper part of the supporting rod 11 of each row of middle supporting mechanism 5 is not provided with a transverse groove, the transverse rod sleeve 12 and the transverse rod 13 are not included, the top of the supporting rod 11 is directly and fixedly connected with the sliding rod 17, so the deformation block 4 directly pushes the supporting rod 11 downwards, the supporting rod 11 pushes the sliding block 9 below the supporting rod 11 downwards, the sliding block 9 downwards extrudes the extrusion spring 24 and the air bag 10, the air bag 10 discharges air into the sliding grooves on two sides of the air bag through the air tube 25, and then the air enters the air cavity 28 at the bottom through the vent grooves 27 at the bottom of the sliding grooves;

when the middle supporting mechanism 5 moves downwards to a certain distance, the two sides of the metal pipe begin to extrude the left and right supporting mechanisms 5 adjacent to the middle supporting mechanism 5, at the moment, the left and right deformation blocks 4 rotate around the supporting mechanism 5 below the left and right deformation blocks to adapt to the radian of the metal pipe and be more attached to the surface of the metal pipe, and then the rubber blocks 19 deform to further reduce the possibility of deformation of the surface of the metal pipe; the left and right deformation blocks 4 press a sliding rod 17 below the left and right deformation blocks downwards, the sliding rod 17 pushes a first piston 16 downwards, the first piston 16 pushes gas below the first piston into a transverse groove at the upper part of the supporting rod 11 through a vent hole 23, the gas pushes a second piston 21 towards the direction close to the supporting mechanism 5 in the middle of each row, the second piston 21 pushes a transverse rod 13 and a friction block 14, the friction block 14 is abutted to the supporting mechanism 5 in the middle of each row, the supporting mechanism 5 in the middle of each row and the left and right supporting mechanisms 5 are fixed, at the moment, the supporting mechanism 5 in the middle of each row and the deformation block 4 at the top of the left and right supporting mechanisms 5 adapt to the shape of the metal pipe, the friction block 14 prevents the supporting mechanisms 5 from relative displacement, when the metal pipe continuously moves downwards and sequentially presses the other supporting mechanisms 5 at two sides, the other supporting mechanisms 5 have the same structure as the two supporting mechanisms 5 at two sides of the middle supporting mechanism 5, by analogy, each deformation block 4 contacted with the metal pipe is relatively fixed after being matched with the shape of the metal pipe, so that the stress of the metal pipe is distributed on the surface of the metal pipe more uniformly, and the possibility of deformation of the metal pipe is reduced;

when two supporting mechanism 5 of the middle supporting mechanism 5 left and right sides move down a certain distance, the bracing piece 11 of two supporting mechanism 5 about moves down, promote slider 9 to move down, slider 9 promotes dog 26 downwards, dog 26 moves down and blocks up trachea 25, thereby prevent that middle supporting mechanism 5 from continuing to move down, fix all supporting mechanism 5, and then fixed tubular metal resonator, accomplish when the shape of 4 adaptation tubular metal resonators of deformation piece and move down after a section distance, fix tubular metal resonator and all supporting mechanism 5, make this device can adapt to the tubular metal resonator of multiple different bores, when changing the tubular metal resonator of different bores, do not need adjustment fixing device, increase work efficiency.

Can be through unscrewing the bolt 33 on the fixed plate 30 before the cutting, adjust the height of slide 31 to the angle of adjustment leather sheath 32, and then the adjustment leather sheath 32 is to the direction of tubular metal resonator pressure, cuts the tubular metal resonator from different directions, and the atress of tubular metal resonator can change, and when different angles cut the tubular metal resonator, it is different to the atress of tubular metal resonator, also adjusts the fixed power of tubular metal resonator, further prevents that the tubular metal resonator from taking place shake or displacement and influence the cutting process.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A positioner for when metal cutting which characterized in that: the device comprises a positioning base (1), a top plate (2) is arranged above the positioning base (1), a positioning column (3) is arranged between the positioning base (1) and the top plate (2), the bottom of the positioning column (3) is fixedly connected with the edge of the positioning base (1), the other end of the positioning column (3) penetrates through the top plate (2) and is in sliding connection with the top plate (2), a plurality of groups of pressing rods (6) are fixedly connected to the bottom of the top plate (2), each group comprises two pressing rods (6), and pressing blocks (7) are fixedly connected to the bottom ends of the pressing rods (6); a groove (8) is formed in the upper portion of the positioning base (1), a plurality of rows of supporting mechanisms (5) are vertically arranged in the groove (8), each row comprises a plurality of independent supporting mechanisms (5), the bottom of each supporting mechanism (5) is connected with the inner wall of the groove (8), and the top of each supporting mechanism (5) is rotatably connected with a deformation block (4);

the bottom of the groove (8) is provided with a plurality of sliding grooves corresponding to the supporting mechanism (5), the sliding grooves are connected with sliding blocks (9) in a sliding mode, the tops of the sliding blocks (9) are fixedly connected with the supporting mechanism (5), the supporting mechanism (5) is connected with the side walls of the sliding grooves in a sliding mode, the bottoms of the sliding blocks (9) are fixedly connected with extrusion springs (24), and the extrusion springs (24) are fixedly connected with the bottoms of the sliding grooves; the supporting mechanism (5) comprises a supporting rod (11) positioned at the bottom, the top of the supporting rod (11) is fixedly connected with a first piston sleeve (15), a first piston (16) is installed in the first piston sleeve (15), the top of the first piston (16) is fixedly connected with a sliding rod (17), the top of the sliding rod (17) is rotatably connected with a rotating block (18), and a return spring (20) is fixedly connected between the bottom of the first piston (16) and the top of the supporting rod (11); a transverse groove is formed in the upper portion of the supporting rod (11), a transverse rod sleeve (12) is fixedly mounted in the transverse groove, a transverse rod (13) is connected to the transverse rod sleeve (12) in a sliding mode, a second piston (21) is fixedly mounted at one end, close to the supporting rod (11), of the transverse rod (13), and a friction block (14) is fixedly mounted at one end, far away from the supporting rod (11), of the transverse rod (13).

2. The positioning device for metal cutting according to claim 1, wherein: one side of the second piston (21) far away from the cross rod (13) is fixedly connected with a pushing spring (22), a plurality of vent holes (23) are formed above the pushing spring (22), and the cross rod sleeve (12) is installed on one side, close to the friction block (14), of the vent holes (23).

3. The positioning device for metal cutting according to claim 2, wherein: the upper part of the support rod (11) of each row of the middle support mechanism (5) is not provided with a transverse groove, and does not comprise a transverse rod sleeve (12) and a transverse rod (13), and the top of the support rod (11) is directly and fixedly connected with a sliding rod (17); the friction block (14) of each rest of the support mechanisms (5) is abutted with the support mechanism (5) close to the middle direction.

4. The positioning device for metal cutting according to claim 1, wherein: the top of the rotating block (18) is provided with a rubber block (19), and a cavity is arranged between the rubber block (19) and the rotating block (18).

5. The positioning device for metal cutting according to claim 1, wherein: the equal fixedly connected with gasbag (10) in slider (9) below of every row of middle supporting mechanism (5) bottom, the extrusion spring (24) cover of its below is established in gasbag (10) outside, gasbag (10) both sides are connected with trachea (25), middle spout in every row has a perfect understanding two spouts of its both sides through trachea (25), air cavity (28) have been seted up to middle spout below, each row sets up air channel (27) that are used for lining up air cavity (28) with two adjacent spout bottoms of middle spout.

6. The positioning device for metal cutting according to claim 5, wherein: the bottom parts of two sliding chutes adjacent to the middle sliding chute in each row are fixedly connected with stop blocks (26), and the stop blocks (26) are matched with the air pipes (25).

7. The positioning device for metal cutting according to claim 1, wherein: briquetting (7) are including diaphragm (29), the vertical fixedly connected with fixed plate (30) in diaphragm (29) bottom, and fixed plate (30) bottom sliding connection has slide (31), slide (31) bottom fixedly connected with leather sheath (32), and the one end fixed connection of fixed plate (30) is kept away from with diaphragm (29) to the leather sheath (32) other end, and two fixed plates (30) on two dog (26) of every group are for keeping away from the setting mutually.

8. The positioning device for metal cutting as claimed in claim 7, wherein: a threaded hole is formed in the fixing plate (30), a bolt (33) is installed in the threaded hole, and one end of the bolt (33) is abutted to the sliding plate (31).