CN114932159A

CN114932159A - Numerical control stamping die

Info

Publication number: CN114932159A
Application number: CN202210119224.9A
Authority: CN
Inventors: 王一安; 董和
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-08
Filing date: 2022-02-08
Publication date: 2022-08-23

Abstract

The invention relates to the technical field of stamping dies, in particular to a numerical control stamping die which comprises a punching machine, an upper die, a lower die, sliding rods, a limiting device, an air injection mechanism and a base, wherein L-shaped supports are welded at the tops of two ends of the base, the punching machine is fixed between the tops of the two L-shaped supports, the sliding rods are respectively installed at two sides of the punching machine, the top ends of the sliding rods are welded on the L-shaped supports, the bottom ends of the sliding rods are welded at the top of the base, the upper die is welded below the punching machine, two sides of the upper die are respectively connected with the two sliding rods in a sliding mode, and clamping grooves are formed in two ends of the upper die. According to the invention, the limiting device is designed as a protection mechanism, so that the punching head of the upper die cannot be damaged when the punching machine is directly started up even though residual plates or hard objects on the top of the lower die plate are not carefully observed before a switch of the punching machine is opened, and impurities such as scrap iron and the like generated on the top of the lower die plate can be cleaned by air injection through the design of the air injection mechanism.

Description

Numerical control stamping die

Technical Field

The invention relates to the technical field of stamping dies, in particular to a numerical control stamping die.

Background

The die used for stamping is called stamping die, and is called stamping die for short. A die is a special tool for batch processing of material (metallic or non-metallic) into the desired punches. The stamping die is of great importance in stamping, and batch stamping production is difficult to carry out without the stamping die meeting the requirements; without an advanced die, an advanced stamping process cannot be achieved.

When the common stamping die is used, the common lower die is fixed and is not beneficial to processing generated scrap iron and the like, and when the common stamping die is used, the common stamping die has no protection mechanism, and can perform stamping operation only by opening a switch of a stamping machine, if the switch of the stamping machine is not carefully observed, residual plates or hard objects exist on the lower template, and the stamping head of the upper die can be damaged by directly starting the stamping die; and ordinary stamping die can produce impurity such as a large amount of iron fillings when punching press is cut to iron panel, and too much the process that leads to the punching press of iron round pin accumulation, influences the position precision of punching press, and not clear up in time, can influence and be infected with iron fillings on next punching press panel and cause the error.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a numerical control stamping die. The numerical control stamping die is designed for solving the problems that scrap iron cannot be timely treated, a stamping head of an upper die is damaged due to the fact that a lower die plate is provided with residual plates or hard objects and the upper die plate is directly started up because the scrap iron cannot be timely treated and the switch of a stamping machine is not carefully observed before being opened.

The technical scheme adopted by the invention for solving the technical problems is as follows: a numerical control stamping die comprises a stamping machine, an upper die, a lower die, sliding rods, a limiting device, an air injection mechanism and a base, wherein L-shaped supports are welded at the tops of two ends of the base, the stamping machine is fixed between the tops of the two L-shaped supports, the sliding rods are respectively installed at two sides of the stamping machine, the top ends of the sliding rods are welded on the L-shaped supports, the bottom ends of the sliding rods are welded on the top of the base, the upper die is welded below the stamping machine, two sides of the upper die are respectively connected with the two sliding rods in a sliding manner, clamping grooves are respectively formed at two ends of the upper die, the lower die is installed below the upper die, two sides of the lower die are respectively connected with the two sliding rods in a sliding manner, the limiting device is connected at two ends of the lower die, the air injection mechanism is connected between the lower die and the base, a reset spring is sleeved at the bottom of each sliding rod and is positioned between the lower die and the base, sliding grooves are formed between the L-shaped support and the adjacent sliding rods and are formed in the top of the base;

the limiting device comprises a convex block, a fixed block, a clamping mechanism, electric telescopic rods, a lower straight rack, an upper straight rack, a straight gear, a clamping slide block and a clamping groove, wherein the two clamping slide blocks are respectively connected inside the sliding groove in a sliding manner, the tops of the clamping slide blocks are all welded with the convex block, the two sides of the top of the convex block are both provided with the clamping groove, the clamping mechanism is arranged above the convex block close to one side of the lower die and is rotatably connected with the lower die, the electric telescopic rods are welded at the adjacent ends of the two convex blocks, the fixed block is welded between the two electric telescopic rods and is welded on the base, one side of the fixed block is connected with an air injection mechanism, the middle part of the other side of the fixed block is rotatably connected with the straight gear, the upper straight rack is meshed above the straight gear, the lower straight rack is meshed below the straight gear, the upper spur rack and the lower spur rack are respectively welded on the adjacent side walls of the two convex blocks.

The lower die comprises a sliding block, chutes, punching holes, fixed lugs and a fixture block, the sliding block is installed above the reset spring and is connected to two sliding rods in a sliding mode, the two ends of the sliding block are welded with the two fixed lugs respectively, the fixture block is installed below the fixed lugs, the fixture block is welded to the side wall of the sliding block and is connected to a clamping groove in a sliding mode, the punching holes are formed in the top of the sliding block, the chutes are formed in the lower portion of the punching holes and located on one side, far away from the fixed blocks, of the sliding block, the punching holes are connected with a through mode, and the width of the chutes are larger than the diameter of the punching holes.

Specifically, chucking mechanism is including card strip, shifting block, pivot and thrust spring, the welding of card strip bottom has the pivot, the pivot is rotated and is connected in fixed lug, just the welding of card strip bottom has the shifting block, shifting block sliding connection is close to sliding block one side in protruding type piece top, the shifting block is close to sliding block one side welding and has thrust spring, thrust spring welds in the sliding block lateral wall.

Specifically, jet-propelled mechanism includes elasticity air cavity, air duct, gas distribution pipe, jet-propelled head and buckle, elasticity air cavity top is fixed in the sliding block bottom, elasticity air cavity bottom mounting is in the base top, air duct one end runs through the base and connects in the elasticity air cavity, the air duct other end is connected with the gas distribution pipe, just air duct middle part joint has the buckle, the buckle is fixed in the fixed block top and keeps away from elasticity air cavity one side, the gas distribution pipe is fixed in sliding block top lateral wall, just the gas distribution pipe top is connected with a plurality of jet-propelled heads, the jet-propelled scope of jet-propelled head can cover the position between sliding block and the last mould.

Specifically, the sliding block is kept away from gas-distributing pipe one side welding and is had discharge baffle, discharge baffle connects in the chute bottom.

Specifically, the normal installation height of the return spring is equal to the extension height of the elastic air cavity, and the normal installation height of the return spring is larger than the extension length of the return spring during punching of the punching machine.

The invention has the beneficial effects that:

(1) according to the numerical control stamping die, the design of the limiting device and the clamping mechanism is adopted, the stamping machine can vibrate when the upper die and the clamping mechanism drive the lower die to reciprocate, scrap iron remained in the chute can be cleaned, the top of the lower die can be cleaned, the manual cleaning steps are reduced, the possibility that the stamping head of the upper die is damaged due to the fact that the stamping machine is directly opened without carefully checking whether the top of the lower die has the remained plate can be effectively prevented, and the stamping die is well protected.

(2) The numerical control stamping die disclosed by the invention adopts the design of the upper die and the lower die, so that when a stamping machine extends and pushes the upper die downwards, the upper die slides downwards along the sliding rod, when the upper die slides downwards to the position of a stamping hole of the lower die, a sample plate can be stamped and cut, a cut workpiece falls to a chute from the stamping hole and then falls off from the chute, part of scrap iron generated by processing can slide off through the chute, so that the residue of the scrap iron in the lower die is reduced, and the stamping process can be completely carried out by setting two starting items, so that the accidents of damage to a stamping head of the upper die and the like caused by mistakenly touching a switch or having a residual plate at the top of the lower die can be effectively prevented.

(3) The numerical control stamping die adopts the design of the air injection mechanism, the sliding block can compress the elastic air cavity when moving downwards, the internal air is conveyed to the air distribution pipe through the air guide pipe after the elastic air cavity is pressed, the air is sprayed out from the air distribution pipe through the air injection head to clean the top of the sliding block, scrap iron can be blown off, when the stamping machine moves upwards, the lower die is pulled to move upwards through the clamping mechanism, the elastic air cavity is stretched, air can enter the air distribution pipe from the air injection head and then enter the elastic air cavity from the air distribution pipe and the air guide pipe for next compression, and through the design and the use of the air injection mechanism, the top of the lower die can be cleaned, the steps of manual cleaning are reduced, and the safety during stamping is also improved.

Drawings

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

Fig. 1 is a first schematic diagram of a numerical control stamping die provided by the present invention;

fig. 2 is a second schematic diagram of a numerical control stamping die provided by the present invention;

FIG. 3 is a third schematic view of a numerical control stamping die according to the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is a schematic view of a clamping mechanism of a numerical control stamping die according to the present invention;

fig. 6 is a schematic connection diagram of a convex block and a fixed block of the numerical control stamping die provided by the invention.

In the figure: 1. a stamping press; 2. an L-shaped bracket; 3. an upper die; 4. a lower die; 41. a slider; 42. a chute; 43. punching a hole; 44. fixing the bump; 45. a clamping block; 5. a slide bar; 6. a limiting device; 61. a convex block; 62. a fixed block; 63. a chucking mechanism; 631. clamping the strip; 632. shifting blocks; 633. a rotating shaft; 634. a thrust spring; 64. an electric telescopic rod; 65. a lower straight rack; 66. feeding straight racks; 67. a spur gear; 68. clamping the sliding block; 69. a clamping groove; 7. an air injection mechanism; 71. an elastic air cavity; 72. an air duct; 73. a gas distributing pipe; 74. a gas ejection head; 75. buckling; 8. a discharge baffle; 9. a base; 10. a return spring; 11. a card slot; 12. a chute.

Detailed Description

The present invention will be further described with reference to the following detailed description so that the technical means, the creation features, the achievement purposes and the effects of the present invention can be easily understood.

As shown in fig. 1-6, the numerical control stamping die of the present invention comprises a stamping machine 1, an upper die 3, a lower die 4, a slide bar 5, a limiting device 6, an air injection mechanism 7 and a base 9, wherein L-shaped brackets 2 are welded on the tops of both ends of the base 9, the stamping machine 1 is fixed between the tops of the two L-shaped brackets 2 and can stamp and cut a plate material, the slide bar 5 is respectively installed on both sides of the stamping machine 1 and can limit the upper die 3 and the lower die 4 so that the upper die 3 and the lower die 4 can only slide up and down, the top end of the slide bar 5 is welded on the L-shaped bracket 2, the bottom end of the slide bar 5 is welded on the top of the base 9, the upper die 3 is welded on the lower side of the stamping machine 1, both sides of the upper die 3 are respectively connected to the two slide bars 5 in a sliding manner, the two ends of the upper die 3 are both provided with clamping grooves 11, the lower die 4 is installed on the lower side of the upper die 3 and can be matched with the upper die 3 to be processed into a required stamping part, the two sides of the lower die 4 are respectively connected with two sliding rods 5 in a sliding manner, the two ends of the lower die 4 are connected with limiting devices 6 which can limit the lower die 4, an air injection mechanism 7 is connected between the lower die 4 and a base 9 and can blow and clean the top of the lower die 4, the bottoms of the sliding rods 5 are respectively sleeved with a return spring 10 which can help the lower die 4 to return to the original height, the return springs 10 are positioned between the lower die 4 and the base 9, sliding grooves 12 are arranged between the L-shaped support 2 and the adjacent sliding rods 5, and the sliding grooves 12 are arranged at the top of the base 9;

the limiting device 6 comprises a convex block 61, a fixed block 62, a clamping mechanism 63, electric telescopic rods 64, a lower straight rack 65, an upper straight rack 66, a straight gear 67, clamping slide blocks 68 and clamping grooves 69, wherein the two clamping slide blocks 68 are respectively connected inside the sliding groove 12 in a sliding manner, the convex block 61 is welded on the top of each clamping slide block 68, the clamping grooves 69 are formed in the two sides of the top of each convex block 61, the clamping mechanism 63 is installed above each convex block 61 and close to one side of the lower die 4, the clamping mechanism 63 is connected to the lower die 4 in a rotating manner, the electric telescopic rods 64 are welded on the adjacent ends of the two convex blocks 61, the fixed block 62 is welded between the two electric telescopic rods 64, the fixed block 62 is welded on the base 9, one side of the fixed block 62 is connected to the air injection mechanism 7, the middle part of the other side of the fixed block 62 is connected with the straight gear 67 in a rotating manner, the upper straight gear 66 is meshed above the straight gear 67, the lower straight gear 65 is meshed below the straight gear 67, the upper spur rack 66 and the lower spur rack 65 are respectively welded to the adjacent side walls of the two convex blocks 61; when the electric telescopic rod 64 is controlled to shorten, the electric telescopic rod 64 can pull the convex block 61 towards the middle and drive the clamping slide block 68 to slide in the chute 12, the top of the convex block 61 can extrude the clamping mechanism 63 to rotate, the top of the clamping mechanism 63 is not clamped in the clamping grooves 11 at the two ends of the upper die 3, and after the convex blocks 61 approach each other, the lower straight rack 65 and the upper straight rack 66 are driven to be meshed with the straight gear 67 to rotate and approach each other, and the sliding speeds of the two convex blocks 61 are prevented from being inconsistent, so that the clamping mechanism 63 is not loosened simultaneously, when the convex blocks 61 approach each other, the lower die 4 can be clamped in the clamping grooves 69 at the two sides of the convex blocks 61, at the moment, the convex blocks 61 can support the bottom of the lower die 4 and are not in a suspended state any more, when the electric telescopic rod 64 is controlled to extend, the original state can be recovered, through the design of the limiting device 6, whether the residual plate is left at the top of the lower die 4 is not carefully checked can be effectively prevented, and directly open punching machine 1 and lead to the possibility of the punching head damage of upper die 3, fine protection stamping die, and open punching machine 1 when not controlling electric telescopic handle 64 and shorten, can cooperate jet-propelled mechanism 7 to clear up 4 tops of bed die.

Specifically, the lower mold 4 includes a sliding block 41, an inclined groove 42, a punching hole 43, a fixing protrusion 44 and a latch 45, the sliding block 41 is installed above the return spring 10, the sliding block 41 is connected with the two sliding rods 5 in a sliding manner, two fixing convex blocks 44 are respectively welded at two ends of the sliding block 41, a clamping block 45 is arranged below each fixing convex block 44, the clamping block 45 can be clamped in clamping grooves 69 at two sides of the convex block 61, the convex block 61 can support the bottom of the lower die 4 and is not in a suspended state any more, the lower die 4 can be limited, the fixture blocks 45 are welded on the side wall of the sliding block 41, the fixture blocks 45 are connected with the clamping grooves 69 in a sliding manner, the top of the sliding block 41 is provided with a punching hole 43, the lower part of the punching hole 43 is provided with a chute 42, the inclined groove 42 is positioned on one side of the sliding block 41 far away from the fixed block 62, the punching hole 43 is communicated with the inclined groove, and the width of the inclined groove 42 is larger than the diameter of the punching hole 43; extension of punching machine 1 and promote mould 3 downwards, it glides along slide bar 5 to go up mould 3, go up mould 3 gliding to the punching press hole 43 position of bed die 4 when, can cut the model punching press, the work piece of cutting away drops to chute 42 from punching press hole 43, again from chute 42 landing, and the part iron fillings that processing produced can pass through chute 42 landing, with the reduction iron fillings remain in bed die 4, and just can be complete through setting up two project that start-up carry out the punching press process, can effectively prevent to miss the emergence of accidents such as the punching press head damage that has remaining panel and leads to mould 3 at touch switch or bed die 4 top.

Specifically, the clamping mechanism 63 includes a clamping strip 631, a shifting block 632, a rotating shaft 633 and a thrust spring 634, the rotating shaft 633 is welded at the bottom of the clamping strip 631, the rotating shaft 633 is rotatably connected to the fixed protrusion 44, the shifting block 632 is welded at the bottom of the clamping strip 631, the shifting block 632 is slidably connected to the top of the convex block 61 near the side of the sliding block 41, the thrust spring 634 is welded at the side of the shifting block 632 near the sliding block 41, and the thrust spring 634 is welded on the side wall of the sliding block 41; the top of the convex block 61 can press the shifting block 632, so that the thrust spring 634 is shortened, and simultaneously the clamping strip 631 rotates along the rotating shaft 633, and the top of the clamping strip 631 is no longer clamped in the clamping grooves 11 at the two ends of the upper die 3; and protruding type piece 61 top no longer extrudees shifting block 632, and thrust spring 634 releases pressure, and promotes shifting block 632 and drives card strip 631 and rotate along pivot 633, and again block in draw-in groove 11, and punching machine 1 can produce vibrations when driving down mould 4 reciprocating motion through last mould 3 and chucking mechanism 63, clears up remaining iron fillings in the chute 42.

Specifically, the air injection mechanism 7 comprises an elastic air cavity 71, an air duct 72, an air distribution pipe 73, air injection heads 74 and buckles 75, the top of the elastic air cavity 71 is fixed at the bottom end of the sliding block 41, the bottom end of the elastic air cavity 71 is fixed at the top of the base 9, one end of the air duct 72 penetrates through the base 9 and is connected to the elastic air cavity 71, the other end of the air duct 72 is connected with the air distribution pipe 73, the buckles 75 are clamped in the middle of the air duct 72, the buckles 75 are fixed at one side, away from the elastic air cavity 71, of the top of the fixing block 62, the air distribution pipe 73 is fixed on the side wall of the top of the sliding block 41, the top of the air distribution pipe 73 is connected with the air injection heads 74, and the air injection range of the air injection heads 74 can cover the position between the sliding block 41 and the upper mold 3; can compress elasticity air cavity 71 during the downward motion of sliding block 41, elasticity air cavity 71 receives the pressure after with inside air carry to gas distribution pipe 73 through air duct 72, gas distribution pipe 73 is again through jet head 74 blowout with gas, clear up sliding block 41 top, can blow down iron fillings, and when punching machine 1 moves up, then can pass through chucking mechanism 63 pulling lower mould 4 and shift up, elasticity air cavity 71 is stretched this moment, the air can get into gas distribution pipe 73 from jet head 74, again from gas distribution pipe 73 and air duct 72 get into elasticity air cavity 71 with the time of next compression usefulness, design through jet mechanism 7 is used, can realize the clearance to lower mould 4, the step of artifical clearance has been reduced, the security when also having increased the punching press.

Specifically, sliding block 41 is kept away from gas-distributing pipe 73 one side welding and is had ejection of compact baffle 8, and ejection of compact baffle 8 is connected in chute 42 bottom, and ejection of compact baffle 8 can prevent that the work piece from dropping to sliding block 41 bottom and influencing subsequent processing.

Specifically, the normal installation height of the return spring 10 is equal to the extension height of the elastic air chamber 71, which can help the elastic air chamber 71 to recover the extension state, and the normal installation height of the return spring 10 is greater than the extension length of the punch 1 during punching, so that a sufficient safety height can be left between the sliding block 41 and the base 9 to prevent people from being injured by clamping.

The working principle is as follows: when the device is used, whether residues exist on the top of the lower die 4 is observed firstly, then a plate needing to be punched and cut is placed on the top of the lower die 4, two electric telescopic rods 64 are controlled to be shortened firstly, the electric telescopic rods 64 can pull the convex blocks 61 towards the middle and drive the clamping sliding blocks 68 to slide in the sliding grooves 12, the top of the convex blocks 61 can extrude the shifting blocks 632, so that the thrust springs 634 are shortened, meanwhile, the clamping strips 631 rotate along the rotating shafts 633, the tops of the clamping strips 631 are not clamped in the clamping grooves 11 at the two ends of the upper die 3 any more, and after the convex blocks 61 approach each other, the lower straight rack 65 and the upper straight rack 66 are driven to be meshed with the straight rack 67 to rotate and approach each other, the sliding speeds of the two convex blocks 61 are prevented from being inconsistent, the clamping mechanisms 63 are not loosened simultaneously, when the convex blocks 61 approach each other, the clamping blocks 45 at the two ends of the sliding block 41 can be clamped in the clamping grooves 69 at the two sides of the convex blocks 61, at this time, the bottom of the lower die 4 is supported by the convex block 61 and is not suspended any more; open the switch of punching machine 1 this moment, punching machine 1 extension and promote mould 3 downwards, it glides along slide bar 5 to go up mould 3, go up mould 3 gliding to the punching press hole 43 position of bed die 4 when, can cut the model punching press, the work piece that cuts off drops to chute 42 from punching press hole 43, again from chute 42 landing to ejection of compact baffle 8, can prevent that the work piece from dropping to sliding block 41 bottom and influencing subsequent processing, and the part iron fillings that processing produced can pass through chute 42 landing, with the residue of reduction iron fillings in bed die 4, and just can be complete carry out the punching press process through setting up two start-up projects, can effectively prevent that the mistake from touching switch or bed die 4 top has remaining panel and the emergence of accidents such as the punching press head damage that leads to mould 3.

When iron chips are generated in the stamping process, the switch of the stamping machine 1 can be closed, so that the stamping machine 1 is restored to the original length, the upper die 3 is also restored to the original position, then the two electric telescopic rods 64 are controlled to extend, the two convex blocks 61 are pushed to be away from each other and restored to the original position, at the moment, the clamping blocks 45 are no longer clamped by the clamping grooves 69 on the two sides of the convex blocks 61, the tops of the convex blocks 61 do not extrude the shifting blocks 632, the thrust springs 634 release pressure, the shifting blocks 632 are pushed to drive the clamping strips 631 to rotate along the rotating shaft 633 and to be clamped in the clamping grooves 11 again, at the moment, the switch of the stamping machine 1 is opened, the upper die 3 is pushed when the stamping machine 1 extends, the upper die 3 drives the clamping mechanism 63 clamped in the clamping grooves 11 to slide downwards, so that the clamping strips 631 push the fixing lugs 44 downwards through the rotating shaft 633, the fixing lugs 44 drive the sliding blocks 41 to slide downwards along the sliding rods 5, at this time, the slide block 41 compresses the elastic air chamber 71 downwards, the elastic air chamber 71 is pressurized to convey the internal air to the air distribution pipe 73 through the air duct 72, the air distribution pipe 73 ejects the air through the air nozzle 74, the top of the sliding block 41 is cleaned to blow off the iron filings, and when the punch 1 moves upwards, the lower mold 4 is pulled to move upwards by the clamping mechanism 63, the elastic air chamber 71 is stretched, air can enter the air distribution pipe 73 from the air nozzle 74, and then enter the elastic air chamber 71 from the air distribution pipe 73 and the air guide pipe 72 for the next compression, and the punch 1 can generate vibration when the upper die 3 and the clamping mechanism 63 drive the lower die 4 to reciprocate, so as to clean the scrap iron remained in the chute 42, and through the design and use of the limiting device 6, the cleaning of the lower die 4 can be realized, the steps of manual cleaning are reduced, and the safety during stamping is also improved.

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. The utility model provides a numerical control stamping die, includes punching machine (1), upper die (3), bed die (4), slide bar (5), stop device (6), air jet mechanism (7) and base (9), its characterized in that: the automatic stamping die is characterized in that L-shaped supports (2) are welded at the tops of two ends of the base (9), a stamping machine (1) is fixed between the tops of the two L-shaped supports (2), slide rods (5) are respectively installed on two sides of the stamping machine (1), the top ends of the slide rods (5) are welded on the L-shaped supports (2), the bottom ends of the slide rods (5) are welded at the top of the base (9), an upper die (3) is welded below the stamping machine (1), two sides of the upper die (3) are respectively connected with the two slide rods (5) in a sliding manner, clamping grooves (11) are formed in two ends of the upper die (3), a lower die (4) is installed below the upper die (3), two sides of the lower die (4) are respectively connected with the two slide rods (5) in a sliding manner, two ends of the lower die (4) are connected with limiting devices (6), and an air injection mechanism (7) is connected between the lower die (4) and the base (9), the bottom of each sliding rod (5) is sleeved with a return spring (10), the return springs (10) are located between the lower die (4) and the base (9), sliding grooves (12) are arranged between the L-shaped support (2) and the adjacent sliding rods (5), and the sliding grooves (12) are arranged at the top of the base (9);

stop device (6) include convex block (61), fixed block (62), chucking mechanism (63), electric telescopic handle (64), lower spur rack (65), go up spur rack (66), straight-teeth gear (67), chucking slider (68) and joint groove (69), two chucking slider (68) sliding connection respectively is inside spout (12), just convex block (61) have all been welded at chucking slider (68) top, convex block (61) top both sides all are provided with joint groove (69), chucking mechanism (63) are all installed near bed die (4) one side in convex block (61) top, chucking mechanism (63) rotate to be connected in bed die (4), and two electric telescopic handle (64) have all been welded to the adjacent one end of convex block (61), two the welding has fixed block (62) between electric telescopic handle (64), just fixed block (62) weld in base (9), fixed block (62) one side is connected in jet-propelled mechanism (7), fixed block (62) opposite side middle part is rotated and is connected with spur gear (67), spur gear (67) top meshing has last spur rack (66), spur gear (67) below meshing has lower spur rack (65), it welds respectively in the adjacent lateral wall of two protruding type pieces (61) to go up spur rack (66) and lower spur rack (65).

2. The numerical control stamping die of claim 1, wherein: the lower die (4) comprises a sliding block (41), a chute (42), a punching hole (43), a fixed convex block (44) and a clamping block (45), the sliding block (41) is arranged above the return spring (10), the sliding block (41) is connected with the two sliding rods (5) in a sliding manner, two fixing convex blocks (44) are respectively welded at two ends of the sliding block (41), a clamping block (45) is installed below each fixing convex block (44), the clamping blocks (45) are welded on the side wall of the sliding block (41), the clamping block (45) is connected with the clamping groove (69) in a sliding manner, the top of the sliding block (41) is provided with a punching hole (43), a chute (42) is arranged below the punching hole (43), and the inclined groove (42) is positioned on one side of the sliding block (41) far away from the fixed block (62), the punching hole (43) is connected with the through hole, and the width of the inclined groove (42) is larger than the diameter of the punching hole (43).

3. A numerical control stamping die as defined in claim 2, wherein: chucking mechanism (63) are including card strip (631), shifting block (632), pivot (633) and thrust spring (634), the welding of card strip (631) bottom has pivot (633), pivot (633) rotate to be connected in fixed lug (44), just the welding of card strip (631) bottom has shifting block (632), shifting block (632) sliding connection is close to sliding block (41) one side in protruding type piece (61) top, shifting block (632) are close to sliding block (41) one side welding has thrust spring (634), thrust spring (634) weld in sliding block (41) lateral wall.

4. The numerical control stamping die of claim 3, wherein: the air injection mechanism (7) comprises an elastic air cavity (71), an air duct (72), an air distribution pipe (73), an air injection head (74) and a buckle (75), the top of the elastic air cavity (71) is fixed at the bottom end of the sliding block (41), the bottom end of the elastic air cavity (71) is fixed at the top of the base (9), one end of the air duct (72) penetrates through the base (9) and is connected with the elastic air cavity (71), the other end of the air duct (72) is connected with an air distributing pipe (73), a buckle (75) is clamped in the middle of the air duct (72), the buckle (75) is fixed on one side of the top of the fixed block (62) far away from the elastic air cavity (71), the air distribution pipe (73) is fixed on the side wall of the top of the sliding block (41), and the top of the gas distribution pipe (73) is connected with a plurality of gas nozzles (74), and the gas spraying range of the gas nozzles (74) can cover the position between the sliding block (41) and the upper die (3).

5. The numerical control stamping die of claim 4, wherein: sliding block (41) are kept away from gas-distributing pipe (73) one side welding and are had ejection of compact baffle (8), ejection of compact baffle (8) are connected in chute (42) bottom.

6. The numerical control stamping die of claim 5, wherein: the normal installation height of the return spring (10) is equal to the extension height of the elastic air cavity (71), and the normal installation height of the return spring (10) is larger than the extension length of the punch (1) during punching.