CN113751565A

CN113751565A - Punching platform of numerical control punching machine

Info

Publication number: CN113751565A
Application number: CN202110926722.XA
Authority: CN
Inventors: 王盛; 刘亚超
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-12-07

Abstract

The invention discloses a stamping platform of a numerical control stamping machine, which comprises a base, wherein a stamping equipment body for stamping is arranged above the base, a stamping groove matched with the stamping equipment body is formed in the upper end of the base, a top die equipment body is arranged in the stamping groove, two circular grooves are symmetrically formed in the upper end of the base, a cylinder body is fixedly arranged below the two circular grooves respectively, and two sliding grooves are symmetrically formed in the upper end of the base. According to the invention, the impurities on the upper surface of the base are brushed away by the brush strip, so that the influence of the impurities on the stamping of the workpiece is avoided, the impurities on the upper end of the base are blown away, the cleanliness of the surface of the base is further improved, the rotating shaft is driven to rotate, the roller is driven to rotate, the stamped workpiece is moved, the brush strip is driven to brush the upper surface of the base again, and the impurities generated in the stamping process are brushed away.

Description

Punching platform of numerical control punching machine

Technical Field

The invention relates to the technical field of punching machines, in particular to a punching platform of a numerical control punching machine.

Background

The stamping machine is a stamping machine, in national production, the stamping process has the advantages of material and energy saving, high efficiency, low technical requirement on operators and capability of making products which cannot be achieved by mechanical processing through various die applications compared with the traditional mechanical processing, so that the stamping machine has more and more extensive applications, and the stamping production mainly aims at plates, can make blanking, punching, forming, deep drawing, finishing, fine stamping, shaping, riveting, extruding and the like through the die, and is widely applied to various fields. For example, a great number of accessories such as switch sockets, cups, cupboards, dishes, computer cases and even missile aircraft … … can be produced by a punch through a die.

In the prior patent (publication number: CN112958685A), a punching platform of a numerical control punching machine comprises a punching platform body, a driving structure, a material guiding structure, a winding structure, a guiding structure, an anti-blocking structure and a blanking hopper; the other end of the material guide structure is connected to a driving structure which is arranged on the stamping table body and used for adjusting the angle of the material guide structure; the angle of the material guide structure is convenient to adjust through the driving structure, the material guide structure is arranged obliquely, and the punched workpiece is convenient to take away from a punching die in the moving process of the steel belt, so that the workpiece falls from the material guide structure to a blanking hopper under the action of gravity and is discharged from the blanking hopper, the punched workpiece is prevented from being cleaned through secondary pushing, and the punching efficiency and the punching quality are greatly improved; the anti-blocking structure is arranged to drive the steel belt to move in the guide structure in the moving process, so that the workpiece subjected to stamping is effectively prevented from being blocked in the guide structure, and the workpiece subjected to stamping is cleaned more conveniently and rapidly.

According to the stamping device, the end part of the magnet punching block and the stamping table body are laterally sealed, so that the workpiece is effectively prevented from falling from a lateral gap between the magnet punching block and the stamping table body, the rotating speed of the first guide wheel is reduced in the sliding process of the guide plate and the push plate, the steel belt is convenient to slowly move, the tension of the steel belt is larger, the workpiece needs to be manually taken out after stamping is completed, a mechanism capable of automatically completing material taking is lacked, and therefore the stamping device has larger danger.

Therefore, the numerical control punching platform of the punching machine is provided.

Disclosure of Invention

The invention aims to provide a stamping platform of a numerical control stamping machine, which brushes impurities on the upper surface of a base through a brush strip, avoids the influence of the impurities on the stamping of a workpiece, blows off the impurities on the upper end of the base, further improves the cleanliness of the surface of the base, further drives a rotating shaft to rotate, further drives a roller to rotate, then moves the stamped workpiece, and drives the brush strip to brush the upper surface of the base again, so that the impurities generated in the stamping process are brushed, and the problems in the background art are solved.

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

a stamping platform of a numerical control stamping machine comprises a base, a stamping equipment body for stamping is arranged above the base, the upper end of the base is provided with a stamping groove matched with the stamping equipment body, the stamping groove is internally provided with a top die equipment body, the upper end of the base is symmetrically provided with two circular grooves, the lower parts of the two circular grooves are respectively and fixedly provided with a cylinder body, the upper end of the base is symmetrically provided with two sliding chutes, the insides of the two cylinders are respectively provided with an air pumping mechanism matched with the stamping equipment body, a cleaning mechanism matched with the air pumping mechanism and used for cleaning the upper surface of the base is arranged between the two sliding chutes, the upper end of the base is provided with a rectangular groove, a roller for driving the workpiece to move is arranged in the rectangular groove, the both sides wall of base all fixed mounting have a spacing section of thick bamboo, two the inside of a spacing section of thick bamboo all is equipped with and is used for driving cylinder pivoted elastic mechanism.

The impurity of the upper surface of base is brushed away through the brush strip, avoids the impurity influence to the punching press of work piece, blows away the impurity of base upper end again, and then improves the cleanliness factor on base surface, drives the pivot again and rotates, and then drives the cylinder and rotate, then takes the work piece removal after the punching press to drive the brush strip and clean the brush again to the upper surface of base, brush away the impurity that produces in the stamping process.

Preferably, the pump gas mechanism includes common slidable mounting in the inside connecting rod of circular slot and barrel, the first plectane of upper end fixedly connected with of connecting rod, the outside of connecting rod still overlaps and is equipped with first spring, the diapire elastic connection of first plectane through first spring and circular slot, first gasbag is installed to the bottom of barrel, the upper end fixedly connected with magnet piece of first gasbag, the lower extreme of connecting rod and the upper end fixed connection of magnet piece.

After the stamping equipment body starts, can carry out the punching press to the work piece of base upper end, the stamping equipment body can move the connecting rod through first plectane pressure simultaneously and move down, and the connecting rod can move first gasbag deformation through the magnet piece pressure afterwards, and then impresses the inside gas of first gasbag in the inside second gasbag of spout, then drives second gasbag deformation to be ready for follow-up use.

Preferably, clearance mechanism is including the symmetry install in the second gasbag and the third gasbag of spout both sides wall, two the second gasbag is linked together with two first gasbags respectively, two common slidable mounting has the slide bar between the spout, the part that inserts respectively in two spouts in the both ends of slide bar is respectively with second gasbag and the relative one side fixed connection of third gasbag, two the second gasbag is linked together with two first gasbags respectively, the bottom of slide bar still fixed mounting have be used for carrying out clear brush strip to the upper surface of base, the equidistant fixedly connected with a plurality of shower nozzles in bottom of slide bar, two check valves are installed to one side symmetry of third gasbag, one side the check valve only allows gaseous inside from outside entering third gasbag, the opposite side the check valve only allows gaseous shower nozzle from third gasbag entering.

After the second gasbag deformation, can promote the slide bar and slide along the spout, the brush strip of slide bar bottom will brush the impurity of the upper surface of base afterwards and remove, avoids the impurity to influence the punching press to the work piece, when the slide bar removed, can extrude the inside third gasbag of spout, send into the shower nozzle with gas through the check valve afterwards, again from the shower nozzle blowout, then blow off the impurity of base upper end, and then improve the cleanliness factor on base surface.

Preferably, the elastic mechanism comprises a sliding block and a second circular plate which are movably mounted inside a limiting barrel, the sliding block is fixedly connected with the second circular plate through a fixing rod, the bottom of the sliding block is elastically connected with the inner bottom of the limiting barrel through a second spring, the outer portion of the fixing rod is fixedly connected with a rack, rotating shafts are fixedly connected with the two end portions of the roller respectively, one ends of the rotating shafts extend to the insides of the two limiting barrels respectively, the two ends of the rotating shafts are provided with one-way bearings, the two ends of the rotating shafts are provided with gears, and the gears are meshed with the two racks respectively.

When the stamping equipment body moves down, can move dead lever and slider through the pressure of second plectane and move down, then drive gear revolve through the rack, because one-way bearing's setting, the gear can not drive the pivot and rotate, but moves the back on the stamping equipment body, the slider can rise under the elasticity of second spring, and then drives gear revolve through the rack once more, and the gear can drive the pivot through one-way bearing this moment and rotate, and then drives the cylinder and rotate, then the work piece after the area punching press removes.

Preferably, both of the cylinders are metal tubes.

Because the barrel is the tubular metal resonator, when first spring promotes the magnet piece and upwards removes, some cross sections in the barrel have magnetic flux, according to "Φ being BS", in the process that the magnet piece removed, the magnetic flux of the barrel cross section in the place ahead of the magnet piece will increase, the magnetic flux in the cross section of the barrel behind the magnet piece can reduce, magnetic flux in upper and lower cross section will produce induced current as long as change, the magnetic field of these induced currents always hinders the change of the magnetic field of magnet piece, namely can hinder the motion of magnet piece, the result of judging with lenz law is: "reject to stay" like this the barrel just produces the hindrance effect to the motion of magnet piece, moves the back on the stamping equipment body completely promptly, and the magnet piece still needs a period of time to accomplish to shift up, and at the in-process that the magnet piece shifted up, the inside gas of second gasbag can get back to the inside of first gasbag again, then drives the slide bar and resets, and then drives the brush strip through the slide bar and once more cleans the upper surface of base, brushes the impurity that produces in the stamping process.

Preferably, two the equal symmetry fixedly connected with bar-shaped piece of inner wall of spout, the both ends of slide bar all are equipped with bar-shaped piece complex bar groove.

The bar-shaped groove and the bar-shaped block can ensure that the sliding rod slides stably in the sliding groove, and further the cleaning efficiency of the base is improved.

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

1. after the stamping equipment body is started, impurities on the upper surface of the base can be brushed away through the brush strip, and the influence of the impurities on stamping of a workpiece is avoided.

2. When the slide bar removed, can blow away the impurity of base upper end, and then improve the cleanliness factor on base surface.

3. After moving up the stamping equipment body, the roller can be driven to rotate, and then the workpiece with the stamped workpiece moves.

4. After the stamping equipment body completely moves upwards, the magnet block still needs a period of time to finish moving upwards, then drives the slide bar and resets, and then drives the upper surface of brush strip to the base through the slide bar and again cleans with the brush, brushes the impurity that produces in the stamping process.

Drawings

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

FIG. 2 is a view showing the inside structure of the base after the body of the punching apparatus of the present invention is pressed down;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a top view of the base of the stamping apparatus of the present invention after the body of the stamping apparatus is pressed down;

FIG. 5 is a schematic view of the internal structure of the limiting cylinder of the present invention;

FIG. 6 is an enlarged view of the structure at A of the present invention;

FIG. 7 is an enlarged view of the structure of the present invention at B;

FIG. 8 is an enlarged view of the structure at position C of the present invention.

In the figure: 1. a base; 2. a stamping device body; 3. a circular groove; 4. a barrel; 5. a top die apparatus body; 6. a connecting rod; 7. a first circular plate; 8. a first spring; 9. a magnet block; 10. a first air bag; 11. a chute; 12. a second air bag; 13. a third air cell; 14. a slide bar; 15. brushing the strip; 16. a spray head; 17. a drum; 18. a limiting cylinder; 19. a rotating shaft; 20. a slider; 21. a second circular plate; 22. fixing the rod; 23. a rack; 24. a one-way bearing; 25. a gear; 26. a second spring; 27. a one-way valve.

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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, the present invention provides a stamping platform of a numerical control stamping machine, which has the following technical scheme:

the utility model provides a numerical control punching machine punching press platform, which comprises a base 1, base 1's top is equipped with the stamping equipment body 2 that is used for the punching press, base 1's upper end is seted up with stamping equipment body 2 complex punching press groove, the internally mounted in punching press groove has top mould equipment body 5, two circular slots 3 have been seted up to base 1's upper end symmetry, two circular slots 3's below still respectively fixed mounting have barrel 4, two spout 11 have been seted up to base 1's upper end symmetry, two barrel 4's inside all is equipped with the 2 complex pump gas mechanisms of stamping equipment body, be equipped with between two spout 11 with pump gas mechanism complex be used for carrying out clear clearance mechanism to base 1's upper surface, the rectangular channel has been seted up to base 1's upper end, the internally mounted of rectangular channel has the cylinder 17 that is used for driving the work piece to remove, the equal fixed mounting of both sides wall of base 1 has spacing section of thick bamboo 18, the inside of two spacing section of thick bamboo 18 all is equipped with and is used for driving cylinder 17 pivoted elastic mechanism.

Referring to fig. 1-2, as an embodiment of the present invention, the pumping mechanism includes a connecting rod 6 slidably mounted in the circular groove 3 and the cylinder 4, a first circular plate 7 is fixedly connected to an upper end of the connecting rod 6, a first spring 8 is further sleeved outside the connecting rod 6, a bottom of the first circular plate 7 is elastically connected to a bottom wall of the circular groove 3 through the first spring 8, a first air bag 10 is mounted on a bottom of the cylinder 4, a magnet block 9 is fixedly connected to an upper end of the first air bag 10, and a lower end of the connecting rod 6 is fixedly connected to an upper end of the magnet block 9.

After the stamping equipment body 2 starts, can carry out the punching press to the work piece of base 1 upper end, the stamping equipment body 2 can move connecting rod 6 through first plectane 7 pressure simultaneously and move down, and connecting rod 6 can move first gasbag 10 deformation through magnet piece 9 pressure afterwards, and then impresses the inside gas of first gasbag 10 in the inside second gasbag 12 of spout 11, then drives second gasbag 12 deformation to subsequent use.

1-4 and 6, the cleaning mechanism comprises a second airbag 12 and a third airbag 13 symmetrically installed on two side walls of a chute 11, the two second airbags 12 are respectively communicated with the two first airbags 10, a sliding rod 14 is installed between the two chutes 11 in a sliding manner, two ends of the sliding rod 14 respectively inserted into the two chutes 11 are respectively fixedly connected with one side of the second airbag 12 opposite to the one side of the third airbag 13, the two second airbags 12 are respectively communicated with the two first airbags 10, a brush strip 15 for cleaning the upper surface of the base 1 is also fixedly installed at the bottom of the sliding rod 14, a plurality of nozzles 16 are fixedly connected at equal intervals at the bottom of the sliding rod 14, two check valves 27 are symmetrically installed at one side of the third airbag 13, one check valve 27 only allows gas to enter the third airbag 13 from the outside, and the other check valve 27 only allows gas to enter the nozzles 16 from the third airbag 13.

After the deformation of second gasbag 12, can promote slide bar 14 and slide along spout 11, brush strip 15 of slide bar 14 bottom will brush the impurity of the upper surface of base 1 afterwards, avoid the influence of impurity to the punching press of work piece, when slide bar 14 removed, can extrude the inside third gasbag 13 of spout 11, send into shower nozzle 16 with gas through check valve 27 afterwards, spout from shower nozzle 16 again, then blow off the impurity of base 1 upper end, and then improve the cleanliness factor on base 1 surface.

As an embodiment of the present invention, referring to fig. 1 to 4 and fig. 7 to 8, the elastic mechanism includes a slider 20 and a second circular plate 21 movably installed inside the limiting cylinder 18, the slider 20 and the second circular plate 21 are fixedly connected by a fixing rod 22, the bottom of the slider 20 is elastically connected to the inner bottom of the limiting cylinder 18 by a second spring 26, a rack 23 is fixedly connected to the outside of the fixing rod 22, two ends of the roller 17 are fixedly connected to rotating shafts 19, one end of each of the two rotating shafts 19 extends into the two limiting cylinders 18, one end of each of the two rotating shafts 19 is installed with a one-way bearing 24, a gear 25 is fixedly connected to the outside of each of the two one-way bearings 24, and the two gears 25 are engaged with the two racks 23.

When the stamping equipment body 2 moves down, can press through second plectane 21 and move dead lever 22 and slider 20 and move down, then drive gear 25 through rack 23 and rotate, because one-way bearing 24's setting, gear 25 can not drive pivot 19 and rotate, but move the back on the stamping equipment body 2, slider 20 can rise under the elasticity of second spring 26, and then drive gear 25 through rack 23 once more and rotate, gear 25 can drive pivot 19 through one-way bearing 24 and rotate this moment, and then drive cylinder 17 and rotate, then the work piece after the area punching press moves.

Referring to fig. 1, both the cylindrical bodies 4 are metal tubes as an embodiment of the present invention.

Because the cylinder 4 is a metal tube, when the first spring 8 pushes the magnet block 9 to move upwards, some cross sections in the cylinder 4 have magnetic flux, according to "Φ ═ BS", in the process that the magnet block 9 moves, the magnetic flux of the cross section of the cylinder 4 in front of the magnet block 9 is increased, the magnetic flux in the cross section of the cylinder 4 behind the magnet block 9 is reduced, the magnetic flux in the upper and lower cross sections is changed, induced current is generated, the magnetic field of the induced current always blocks the change of the magnetic field of the magnet block 9, namely, the movement of the magnet block 9 is blocked, and the result judged by lenz's law is that: the magnet block 9 still needs a period of time to finish moving up after the stamping device body 2 completely moves up, in the process of moving up the magnet block 9, the gas in the second air bag 12 returns to the inside of the first air bag 10 again, then the slide rod 14 is driven to reset, and then the slide rod 14 drives the brush strip 15 to clean the upper surface of the base 1 again, so that impurities generated in the stamping process are removed.

Referring to fig. 1, a bar-shaped block is symmetrically and fixedly connected to the inner walls of the two sliding grooves 11, and bar-shaped grooves matched with the bar-shaped block are formed at both ends of the sliding rod 14.

The strip-shaped groove and the strip-shaped block can ensure that the sliding rod 14 stably slides in the sliding groove 11, and further the cleaning efficiency of the base 1 is improved.

The working principle is as follows: after the stamping equipment body 2 is started, a workpiece at the upper end of the base 1 is stamped, meanwhile, the stamping equipment body 2 presses the connecting rod 6 to move downwards through the first circular plate 7, then the connecting rod 6 presses the first air bag 10 to deform through the magnet block 9, further, air in the first air bag 10 is pressed into the second air bag 12 in the sliding chute 11, then, the second air bag 12 deforms, the sliding rod 14 is pushed to slide along the sliding chute 11, then, the brush strip 15 at the bottom of the sliding rod 14 brushes impurities on the upper surface of the base 1, the stamping of the workpiece is prevented from being influenced by the impurities, when the sliding rod 14 moves, the third air bag 13 in the sliding chute 11 is extruded, then, the air is sent into the spray head 16 through the check valve 27 and then sprayed out from the spray head 16, then, the impurities at the upper end of the base 1 are blown away, and further, the cleanliness of the surface of the base 1 is improved, when the stamping device body 2 moves downwards, the fixed rod 22 and the slide block 20 are pressed by the second circular plate 21 to move downwards, then the gear 25 is driven by the rack 23 to rotate, due to the arrangement of the one-way bearing 24, the rotating shaft 19 is not driven by the gear 25 to rotate, but after the stamping device body 2 moves upwards, the slide block 20 rises under the elastic force of the second spring 26, then the gear 25 is driven by the rack 23 to rotate again, at the moment, the gear 25 drives the rotating shaft 19 to rotate by the one-way bearing 24, further the roller 17 is driven to rotate, then the stamped workpiece moves, because the cylinder 4 is a metal tube, when the magnet block 9 is pushed by the first spring 8 to move upwards, certain cross sections in the cylinder 4 have magnetic fluxes, according to ' phi ' BS ', in the process of moving the magnet block 9, the magnetic flux of the cross section of the cylinder 4 in front of the magnet block 9 is increased, and the magnetic flux of the cross section of the cylinder 4 in rear of the magnet block 9 is reduced, as long as the magnetic fluxes in the upper and lower cross sections change, induced currents are generated, and the magnetic fields of these induced currents always hinder the change of the magnetic field of the magnet block 9, that is, the movement of the magnet block 9, and the result of the lenz's law is: the magnet block 9 still needs a period of time to finish moving up after the stamping device body 2 completely moves up, in the process of moving up the magnet block 9, the gas in the second air bag 12 returns to the inside of the first air bag 10 again, then the slide rod 14 is driven to reset, and then the slide rod 14 drives the brush strip 15 to clean the upper surface of the base 1 again, so that impurities generated in the stamping process are removed.

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.

Claims

1. The utility model provides a numerical control punching machine punching press platform, includes base (1), its characterized in that: the stamping device comprises a base (1), wherein a stamping device body (2) used for stamping is arranged above the base (1), the upper end of the base (1) is provided with a stamping groove matched with the stamping device body (2), a top die device body (5) is arranged inside the stamping groove, two circular grooves (3) are symmetrically formed in the upper end of the base (1), barrels (4) are fixedly arranged below the two circular grooves (3) respectively, two sliding grooves (11) are symmetrically formed in the upper end of the base (1), a pumping mechanism matched with the stamping device body (2) is arranged inside the two barrels (4), a cleaning mechanism matched with the pumping mechanism and used for cleaning the upper surface of the base (1) is arranged between the two sliding grooves (11), a rectangular groove is formed in the upper end of the base (1), a roller (17) used for driving a workpiece to move is arranged inside the rectangular groove, the two side walls of the base (1) are fixedly provided with limiting cylinders (18), and the insides of the limiting cylinders (18) are provided with elastic mechanisms used for driving the roller (17) to rotate.

2. A stamping platform for a numerically controlled press as claimed in claim 1, wherein: pump gas mechanism includes common slidable mounting in inside connecting rod (6) of circular slot (3) and barrel (4), the first plectane (7) of upper end fixedly connected with of connecting rod (6), the outside of connecting rod (6) still the cover is equipped with first spring (8), the diapire elastic connection of first spring (8) and circular slot (3) is passed through to the bottom of first plectane (7), first gasbag (10) are installed to the bottom of barrel (4), the upper end fixedly connected with magnet piece (9) of first gasbag (10), the lower extreme of connecting rod (6) and the upper end fixed connection of magnet piece (9).

3. A stamping platform for a numerically controlled press as claimed in claim 2, wherein: the cleaning mechanism comprises second air bags (12) and third air bags (13) which are symmetrically arranged on two side walls of a sliding groove (11), the two second air bags (12) are respectively communicated with the two first air bags (10), a sliding rod (14) is arranged between the two sliding grooves (11) in a sliding mode, the two ends of the sliding rod (14) are respectively inserted into the two sliding grooves (11), the parts of the two sliding rods (14) are respectively fixedly connected with one sides of the second air bags (12) and the third air bags (13) opposite to each other, the two second air bags (12) are respectively communicated with the two first air bags (10), brush strips (15) used for cleaning the upper surface of the base (1) are further fixedly arranged at the bottom of the sliding rod (14), a plurality of spray heads (16) are fixedly connected at equal intervals at the bottom of the sliding rod (14), and two one side of the third air bag (13) is symmetrically provided with two one-way valves (27), the one-way valve (27) on one side allows gas to enter the interior of the third airbag (13) only from the outside, and the one-way valve (27) on the other side allows gas to enter the shower head (16) only from the third airbag (13).

4. A stamping platform for a numerically controlled press as claimed in claim 1, wherein: elastic mechanism includes inside slider (20) of a spacing section of thick bamboo (18) and second plectane (21) of movable mounting, through dead lever (22) fixed connection between slider (20) and second plectane (21), the bottom of slider (20) is passed through second spring (26) and the interior bottom elastic connection of a spacing section of thick bamboo (18), outside fixedly connected with rack (23) of dead lever (22), the equal fixedly connected with pivot (19) in both ends of cylinder (17), two the one end of pivot (19) extends to the inside of two spacing sections of thick bamboo (18) respectively, two one-way bearing (24) are all installed to the one end of pivot (19), two the equal fixedly connected with gear (25) in outside of one-way bearing (24), two gear (25) mesh with two rack (23) respectively.

5. A stamping platform for a numerically controlled press as claimed in claim 1, wherein: the two cylinders (4) are both metal tubes.

6. A stamping platform for a numerically controlled press as claimed in claim 3, wherein: the inner walls of the two sliding grooves (11) are symmetrically and fixedly connected with strip-shaped blocks, and strip-shaped grooves matched with the strip-shaped blocks are formed in the two ends of the sliding rod (14).