CN218050033U

CN218050033U - Automatic feeding and discharging mechanism for punch press

Info

Publication number: CN218050033U
Application number: CN202221022775.5U
Authority: CN
Inventors: 朱曼琼
Original assignee: Chengdu Jinlin Precision Machinery Co ltd
Current assignee: Chengdu Jinlin Precision Machinery Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-12-16
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to a supplementary field of punching press specifically discloses a unloading mechanism in automation for punch press, including frame, feed tank, conveyer, location platform, material loading transport mechanism and unloading transport mechanism from left to right set up in the frame in proper order. The utility model has the advantages that the positioning and feeding of plates with different specifications can be realized without the intervention of workers, the blanking of different dies after stamping is realized, and the automatic feeding of the plates is realized through the screw rod lifter, the lifting platform and the elastic roller which are arranged on the feeding box; the positioning device arranged on the positioning table is used for positioning the plates with different specifications; the automatic feeding and discharging and the simultaneous feeding and discharging of the plates are realized through the synchronous structure of the feeding and conveying mechanism and the discharging and conveying mechanism; the blanking after different dies are stamped is realized through the stamping part suction device of the blanking carrying device.

Description

Automatic feeding and discharging mechanism for punch press

Technical Field

The utility model relates to a supplementary field of punching press, especially an unloading mechanism in automation for punch press.

Background

Still manual feeding and unloading that present punch press most adopted in process of production exist very big potential safety hazard, the intervention that still needs the people of unloading auxiliary assembly on current punch press, one person can only operate an equipment, can't realize automatic positioning and continuous production, can not adapt to the panel of different specifications, the precision of a batch product location often has very big deviation, and because the change of panel form after the punching press is accomplished, traditional unloading auxiliary assembly can only rely on the manual work to fix and carry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide an unloading mechanism in automation for punch press.

The purpose of the utility model is realized through the following technical scheme: the utility model provides an automatic unloading mechanism of going up for punch press includes frame, feed tank, conveyer, location platform, material loading transport mechanism and unloading transport mechanism from left to right set up in proper order in the frame, the feed tank includes box, elevating platform and lead screw lift, the bottom half is provided with elevator motor, elevator motor output shaft and lead screw lift input shaft, the elevating platform slope sets up lead screw lift's output, be provided with the discharge gate on the lateral wall of box upper end, be provided with pushing equipment on the feed tank, be provided with the elastic roller on pushing equipment's the output shaft, the elastic roller is located the box and with discharge gate parallel arrangement, conveyer slope sets up and its one end and the discharge gate cooperation that is located the eminence, the location platform is located one side of conveyer low place, the location platform includes baffle, bottom plate and positioner, the bottom plate is detached all to be provided with the baffle with all the other three sides of conveyer just right one side, and the bottom plate below is installed the positioning motor, be provided with the location motor on the output shaft, the bottom plate is located the location roller is located breach, the cylinder locating device is located two synchronous end of cylinder sets up the cylinder fixture, the cylinder both sides are connected with the cylinder head, the cylinder is connected with two synchronous cylinder head.

Specifically, the conveying device comprises two guard plates and a plurality of rollers, the rollers are parallelly and rotatably arranged between the two guard plates, and the two guard plates are fixed on the frame.

Specifically, the stroke synchronizer is an electromagnetic valve, an air inlet of the electromagnetic valve is connected with a tee joint A, air inlets of the two positioning cylinders are communicated with the tee joint A through an air pipe A respectively, an air outlet of the electromagnetic valve is connected with a tee joint B, and air outlets of the two positioning cylinders are communicated with the tee joint B through an air pipe B respectively.

Specifically, be provided with two guide rails in the frame, the frame on be provided with a driving motor, driving motor's output is connected with a initiative lead screw, is provided with syntropy transmission on the initiative lead screw, and the initiative lead screw passes through syntropy transmission and connects a driven lead screw, threaded connection has first slider and second slider on the initiative lead screw, threaded connection has third slider and fourth slider on the driven lead screw, first slider and second slider slide and set up on a guide rail, third slider and fourth slider slide and set up on another guide rail, first slider with the third slider passes through first crane span structure and connects, the second slider with the fourth slider passes through the second crane span structure and connects, material loading handling mechanism sets up on first crane span structure, unloading handling mechanism sets up on the second crane span structure.

Specifically, the homodromous transmission device comprises a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a connecting rod, the first bevel gear is arranged on the driving screw rod and meshed with the second bevel gear, the second bevel gear is rigidly connected with the third bevel gear through the connecting rod, the fourth bevel gear is arranged on the driven screw rod, and the third bevel gear is meshed with the fourth bevel gear.

Specifically, the feeding and carrying mechanism comprises a feeding cylinder and a feeding sucker, the feeding cylinder is fixed to the first bridge frame, and a piston rod of the feeding cylinder is connected with the feeding sucker.

Specifically, unloading transport mechanism includes unloading cylinder and stamping workpiece suction means, the one end and the stamping workpiece suction means of unloading cylinder piston rod are connected.

Specifically, stamping workpiece suction means's bottom is provided with central sucking disc, and stamping workpiece suction means articulates all around has four first connecting blocks, four first connecting block articulates respectively has the second connecting block, four first connecting block and four second connecting block bottoms are provided with supplementary sucking disc respectively.

Specifically, anchor clamps include base plate, buffer spring and splint, the end fixed connection of base plate and location cylinder piston rod, the base plate passes through buffer spring and is connected with splint, the baffle is provided with the through-hole that corresponds with splint.

Specifically, stop device includes photoelectric switch and limiting plate, photoelectric switch sets up at the limiting plate top, the limiting plate is provided with the rack respectively at conveyer one side both ends dorsad, the baffle outside is provided with the hand wheel, a side shield is passed in the pivot of hand wheel and is extended to another side shield, is provided with two limit gear in the hand wheel pivot, two limit gear meshes with two racks respectively, be provided with fixed slot on the baffle.

The utility model has the advantages of it is following:

the utility model adopts the structure that the feeding box, the conveying device, the positioning table, the feeding and carrying mechanism and the discharging and carrying mechanism are sequentially arranged on the frame from left to right, and the compactness and the integrity of the automatic feeding and discharging and carrying mechanism for the punch press are enhanced by adopting the integrated frame, so that the occupied area is saved, the position adjustment is convenient, and the assistance is provided for different punch presses; the automatic feeding of the plates is realized through a lifting platform, a screw rod lifter and an elastic roller which are arranged in the feeding box; the conveying of the plates is realized through a conveying device; the positioning device arranged on the positioning table is used for positioning the plates with different specifications; the automatic feeding and discharging and the simultaneous feeding and discharging of the plates are realized through the synchronous structure of the feeding and conveying mechanism and the discharging and conveying mechanism; through the stamping part suction device of the blanking carrying mechanism, blanking after different dies are stamped is realized.

Drawings

Fig. 1 is a schematic structural view of an automatic loading and unloading mechanism for a punch press according to the present invention;

FIG. 2 is a top view of the pushing motor and the elastic roller of the present invention;

fig. 3 is a top view of the positioning table of the present invention;

fig. 4 is a schematic view of the installation of the feeding and carrying mechanism and the discharging and carrying mechanism and the structure of the co-rotating device according to the present invention;

fig. 5 is a schematic structural view of the stamping part suction device of the present invention;

FIG. 6 is a schematic structural view of the stroke synchronizer of the present invention;

in the figure: 1-a machine frame, 2-a feeding box, 3-a conveying device, 4-a positioning table, 5-a feeding conveying mechanism, 6-a blanking conveying mechanism, 7-a box body, 8-a lifting table, 9-a screw rod lifter, 10-a discharging port, 11-a material pushing motor, 12-an elastic roller, 13-a baffle, 14-a bottom plate, 15-a positioning device, 16-a positioning motor, 17-a positioning roller, 18-a notch, 19-a photoelectric switch, 20-a limiting device, 21-a positioning cylinder, 22-a clamp, 23-a stroke synchronizing device, 24-a protective plate, 25-a roller, 26-an electromagnetic valve, 27-a tee joint A, 28-a tee joint B, 29-a guide rail, 30-a driving motor and 31-a driving screw rod, 32-homodromous transmission device, 33-driven screw rod, 34-first sliding block, 35-second sliding block, 36-third sliding block, 37-fourth sliding block, 38-first bridge, 39-second bridge, 40-first bevel gear, 41-second bevel gear, 42-third bevel gear, 43-fourth bevel gear, 44-connecting rod, 45-feeding cylinder, 46-feeding suction cup, 47-discharging cylinder, 49-stamping part suction device, 52-central suction cup, 53-first connecting block, 54-second connecting block, 55-auxiliary suction cup, 57-base plate, 58-buffer spring, 59-clamping plate, 60-limiting plate, 61-rack, 62-hand wheel, 63-limiting gear, 64-fixed clamping groove, 65-air pipe A, 66-air pipe B, 67-lifting motor.

Detailed Description

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a" \8230; "does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element.

The present invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 to 6, an automatic loading and unloading mechanism for a punch press comprises a frame 1, a feeding box 2, a conveying device 3, a positioning table 4, a loading and carrying mechanism 5 and an unloading and carrying mechanism 6, wherein the feeding box 2, the conveying device 3, the positioning table 4, the loading and carrying mechanism 5 and the unloading and carrying mechanism 6 are sequentially arranged on the frame 1 from left to right, the feeding box 2 comprises a box body 7, a lifting table 8 and a screw rod lifter 9, a lifting motor is arranged at the bottom of the box body 7, an output shaft of the lifting motor is connected with an input shaft of the screw rod lifter 9, the lifting table 8 is obliquely arranged at an output end of the screw rod lifter 9, a discharge port 10 is arranged on a side wall of the upper end of the box body 7, a pushing motor 11 is arranged on the feeding box 2, an elastic roller 12 is arranged on an output shaft of the pushing motor 11, the elastic roller 12 is positioned in the box body 7 and is parallel to the discharge port 10, the conveying device 3 is obliquely arranged, one end of the conveying device, which is located at a high position, is matched with the discharge hole 10, the positioning table 4 is located at one side of a low position of the conveying device 3, the positioning table 4 comprises a baffle 13, a bottom plate 14 and a positioning device 15, the baffle 13 is arranged on the bottom plate 14 except the other three sides of one side, which is just opposite to the conveying device 3, of the bottom plate 14, a positioning motor 16 is arranged below the bottom plate 14, a positioning roller 17 is arranged on an output shaft of the positioning motor 16, a notch 18 is arranged at the position, which is located on the positioning roller 17, of the bottom plate 14, the positioning roller 17 is located in the notch 18, the positioning device 15 comprises a limiting device 20, two positioning cylinders 21 and a clamp 22, the limiting device 20 is arranged on the bottom plate 14, the two positioning cylinders 21 are respectively arranged at two sides of the bottom plate 14, and a stroke synchronizing device 23 is connected between the two positioning cylinders 21, the end heads of the piston rods of the two positioning cylinders 21 are fixedly provided with clamps 22, and the clamps 22 are movably arranged on the bottom plate 14. In the scheme, all mechanisms and devices are arranged on the same frame 1, so that the compactness and the integrity of the automatic feeding and discharging conveying mechanism 6 for the punch press are enhanced, the occupied area is saved, and is convenient for adjusting the position, provides assistance for different punching machines, plates are added into the feeding box 2 from the upper part of the box body 7 in advance, the plates are stacked in the box body 7 in an inclined layer, the lifting platform 8 is positioned at the lowest part when the feeding box 2 is fully loaded, when the punch starts to produce, the automatic loading and unloading mechanism is started, the lifting motor 67 drives the output shaft to rotate for a certain angle according to the thickness of the plate and then stops, thereby driving the input shaft of the screw rod lifter 9 to rotate, the worm on the input shaft drives the worm wheel to rotate, the rotation of the worm wheel enables the lifting screw rod meshed with the internal thread of the worm wheel to rise, the lifting platform 8 is pushed to rise for a certain height, the pushing motor 11 drives the elastic roller 12 to continuously rotate, the plate on the uppermost layer is pushed out from the discharge hole 10 after contacting the elastic roller 12, under the action of gravity, the plate is conveyed to the bottom plate 14 of the positioning table 4 through the inclined conveying device 3, automatic feeding of the plate is realized, the positioning motor 16 drives the positioning roller 17 to rotate continuously, the plate on the bottom plate 14 is pushed backwards until the plate contacts the limiting plate 60, the photoelectric switch 19 arranged on the limiting plate 60 senses that the plate is in place, the two positioning cylinders 21 are interlocked to simultaneously push the piston rods to move oppositely, the piston rods push the clamp 22 to adjust the plate to the center to complete positioning, the positioning cylinders 21 automatically reset after the set number of seconds, the clamp 22 returns to the initial position, and automatic positioning of the plate is realized, when the plate needs to be added again, the lifting motor 67 is started to rotate reversely to lower the lifting platform 8 to the required height, and the plate can be reassembled.

Further, the conveying device 3 comprises two guard plates 24 and a plurality of rollers 25, the plurality of rollers 25 are parallelly and rotatably arranged between the two guard plates 24, and the two guard plates 24 are fixed on the frame 1. In this scheme, both sides backplate 24 can guarantee that panel can not drop from both sides in data send process, has protected operating personnel's safety, also can restrict the direction of motion of panel simultaneously, realizes tentatively fixing a position, and when panel was on roller 25, a plurality of rollers 25 rotated by oneself and conveyed panel downwards, can ensure that panel conveys to location platform 4 under the effect that need not extra power and only lean on gravity, has saved the energy.

Further, the stroke synchronizer 23 is an electromagnetic valve 26, an air inlet of the electromagnetic valve 26 is connected with a tee joint a27, air inlets of the two positioning cylinders 21 are respectively communicated with the tee joint a27 through air pipes a65, an air outlet of the electromagnetic valve 26 is connected with a tee joint B28, and air outlets of the two positioning cylinders 21 are respectively communicated with the tee joint B through air pipes B66. In this scheme, when solenoid valve 26 received photoelectric switch 19's signal, the power air supply shunts through tee bend A27 from solenoid valve 26 air inlet, gets into two location cylinders 21's air inlet from trachea A65 and promotes the piston, and the gas that two location cylinders 21 compressed gets into trachea B66 from the gas outlet of location cylinder 21, gathers after getting into solenoid valve 26 gas outlet at tee bend B28 and discharges, makes two location cylinders 21's atmospheric pressure the same to the stroke that makes two pistons is unanimous, ensures the precision of location.

Further, the two guide rails 29 are arranged on the machine frame 1, the machine frame 1 is provided with a driving motor 30, the output end of the driving motor 30 is connected with a driving lead screw 31, the driving lead screw 31 is provided with a homodromous transmission device 32, the driving lead screw 31 is connected with a driven lead screw 33 through the homodromous transmission device 32, the driving lead screw 31 is in threaded connection with a first slider 34 and a second slider 35, the driven lead screw 33 is in threaded connection with a third slider 36 and a fourth slider 37, the first slider 34 and the second slider 35 are slidably arranged on one guide rail 29, the third slider 36 and the fourth slider 37 are slidably arranged on the other guide rail 29, the first slider 34 and the third slider 36 are connected through a first bridge frame 38, the second slider 35 and the fourth slider 37 are connected through a second bridge frame 39, the feeding and carrying mechanisms 5 are arranged on the first bridge frame 38, and the discharging and carrying mechanisms 6 are arranged on the second bridge frame 39. In the scheme, the driving motor 30 drives the driving screw rod 31 to rotate, the driving screw rod 31 drives the driven screw rod 33 to rotate through the homodromous transmission device 32, the first sliding block 34 in threaded connection with the driving screw rod 31 is enabled to move synchronously, the first sliding block 35 and the third sliding block 36 and the fourth sliding block 37 in threaded connection with the driven screw rod 33 are enabled to move synchronously, so that the loading and carrying mechanism 5 arranged on the first bridge frame 38 and the unloading and carrying mechanism 6 arranged on the second bridge frame 39 move synchronously, the positioning is completed on the positioning table 4 due to the plates, the loading position and the unloading position are fixed, the loading and the unloading are realized while the automatic loading and unloading device is used, and the production efficiency is improved.

Further, the same-direction transmission device 32 includes a first bevel gear 40, a second bevel gear 41, a third bevel gear 42, a fourth bevel gear 43 and a connecting rod 44, the driving screw 31 is provided with the first bevel gear 40, the first bevel gear 40 is engaged with the second bevel gear 41, the second bevel gear 41 is rigidly connected with the third bevel gear 42 through the connecting rod 44, the fourth bevel gear 43 is arranged on the driven screw 33, and the third bevel gear 42 is engaged with the fourth bevel gear 43. In the scheme, the specifications of the first bevel gear 40, the second bevel gear 41, the third bevel gear 42 and the fourth bevel gear 43 are consistent, the transmission ratios are consistent, the first bevel gear 40 on the driving screw 31 rotates to drive the second bevel gear 41 to rotate, the second bevel gear 41 drives the third bevel gear 42 fixedly connected with the connecting rod 44 to rotate, the third bevel gear 42 drives the fourth bevel gear 43 to rotate, and the driven screw 33 rotates under the drive of the fourth bevel gear 43 due to the fact that the fourth bevel gear 43 and the first bevel gear 40 are installed in opposite directions, so that synchronous rotation and homodromous rotation of the driving screw 31 and the driven screw 33 are achieved.

Further, the feeding and carrying mechanism 5 includes a feeding cylinder 45 and a feeding suction cup 46, the feeding cylinder 45 is fixed on the first bridge frame 38, and a piston rod of the feeding cylinder 45 is connected with the feeding suction cup 46. In the scheme, the loading and carrying mechanism 5 moves to a position right above the positioning table 4, the loading air cylinder 45 pushes the piston rod to descend, the air cylinder stops acting after the loading sucker 46 contacts with the plate, the sucker starts sucking air, the loading sucker 46 sucks up the plate, and when the sucker reaches a certain negative pressure, the loading air cylinder 45 withdraws the piston rod; the loading and carrying mechanism 5 moves to the position right above the punching table, the loading air cylinder 45 pushes the piston rod to descend to a set height, the suction disc releases negative pressure, the loading suction disc 46 puts the plate on the lower die of the punching machine and then withdraws, and the actions are repeated to realize automatic loading; because the height of the feeding table is fixed, the descending height of the piston rod at each time of material suction is fixed, and the stroke of the air cylinder during material discharging can be adjusted according to the heights of different punching machines before use.

Further, unloading handling mechanism 6 includes unloading cylinder 47 and stamping workpiece suction means 49, the one end and the stamping workpiece suction means 49 of unloading cylinder 47 piston rod are connected. In the scheme, the blanking carrying mechanism 6 moves to be right above the stamping platform, the blanking air cylinder 47 pushes the piston rod to descend, the air cylinder stops acting after the stamping part suction device 49 contacts a stamping part, the stamping part suction device 49 starts, the stamping part suction device 49 sucks up the stamping part, and the feeding and blanking air cylinder 47 withdraws the piston rod after the stamping part suction device 49 reaches a certain negative pressure; the blanking carrying mechanism 6 moves to the upper part of the material piling area, after the blanking air cylinder 47 pushes the piston rod to descend to a set height, the stamping part suction device 49 releases negative pressure, the stamping part suction device 49 retracts the stamping part after the stamping part is put down, and the actions are repeated to realize automatic blanking.

Further, stamping workpiece suction means 49's bottom is provided with central sucking disc 52, and stamping workpiece suction means 49 articulates all around has four first connecting blocks 53, four first connecting block 53 articulates respectively has second connecting block 54, four first connecting block 53 and four second connecting block 54 bottoms are provided with supplementary sucking disc 55 respectively, supplementary sucking disc 55 communicates with stamping workpiece suction means 49 through the pipe of breathing in respectively. In the scheme, the four first connecting blocks 53 are hinged with the stamping part suction device 49, so that a certain degree of freedom exists in the vertical direction; the four second connecting blocks 54 are hinged to the first connecting blocks 53, so that a certain degree of freedom is formed in the vertical direction, the stamping part suction device 49 is in an arc shape which is bent downwards in a natural state, the traditional suction disc of the stamped plate cannot suck the stamping part, the auxiliary suction disc 55 can be well attached to the stamping part no matter the stamping part encountered by the stamping part suction device 49 is a convex surface or a concave surface, and the suction of the stamping part after stamping of different dies is realized.

Further, the clamp 22 comprises a base plate 57, a buffer spring 58 and a clamping plate 59, the base plate 57 is fixedly connected with the end of the piston rod of the positioning cylinder 21, the base plate 57 is connected with the clamping plate 59 through the buffer spring 58, and the baffle 13 is provided with a through hole corresponding to the clamping plate 59. In this scheme, splint 59 is the cuboid, and when location cylinder 21 did not act, splint 59 were located the baffle 13 outside, when location cylinder 21 piston promoted anchor clamps 22 and fixes a position panel, in anchor clamps 22 passed the through-hole of baffle and entered into the baffle, by the compression of buffer spring 58 between base plate 57 and splint 59, played the cushioning effect, alleviateed the damage to panel.

Further, stop device 20 includes photoelectric switch 19 and limiting plate 60, photoelectric switch 19 sets up at limiting plate 60 top, limiting plate 60 is provided with rack 61 respectively at conveyer 3 one side both ends dorsad, the baffle 13 outside is provided with hand wheel 62, a side shield 13 is passed in hand wheel 62's pivot and is extended to another side shield 13, is provided with two limit gear 63 in the hand wheel 62 pivot, two limit gear 63 meshes with two racks 61 respectively, be provided with fixed slot 64 on the baffle 13. In this scheme, through rotating hand wheel 62, drive the rotation of limiting gear 63 on the pivot, limiting gear 63 translates with its meshed rack 61, and rack 61 drives limiting plate 60 translation, inserts fixed pivot into fixed slot 64, accomplishes stop device 20's adjustment, has realized the location of different specification panels.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any way. The technical solutions of the present invention can be used by anyone skilled in the art to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations, without departing from the scope of the technical solution of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention all belong to the protection scope of the present technical solution, without departing from the contents of the technical solution of the present invention.

Claims

1. The utility model provides a go up unloading mechanism in automation for punch press which characterized in that: including frame (1), feed box (2), conveyer (3), location platform (4), material loading transport mechanism (5) and unloading transport mechanism (6) set gradually from left to right on frame (1), feed box (2) include box (7), elevating platform (8) and lead screw lift (9), box (7) bottom is provided with elevator motor, the elevator motor output shaft is connected with lead screw lift (9) input shaft, elevating platform (8) slope sets up the output of lead screw lift (9), be provided with discharge gate (10) on the lateral wall of box (7) upper end, be provided with on feed box (2) motor (11), be provided with elastic roller (12) on the output shaft of material pushing motor (11), elastic roller (12) are located in box (7) and with discharge gate (10) parallel arrangement, conveyer (3) slope sets up and its one end that is located the eminence and location platform (4) cooperation of locating baffle (13), location platform (4) is located one side (13) and the baffle (13) is located the lower in box (7) and the output end of discharge gate (10) is located, the conveying device comprises a bottom plate (14) and a positioning device (15), wherein the other three sides of one side, just opposite to the conveying device (3), of the bottom plate (14) are provided with baffle plates (13), a positioning motor (16) is installed below the bottom plate (14), an output shaft of the positioning motor (16) is provided with a positioning roller (17), the bottom plate (14) is provided with a notch (18) at the position of the positioning roller (17), the positioning roller (17) is located in the notch (18), the positioning device (15) comprises a limiting device (20), two positioning cylinders (21) and a clamp (22), the limiting device (20) is arranged on the bottom plate (14), the two positioning cylinders (21) are respectively arranged on two sides of the bottom plate (14), a stroke synchronizing device (23) is connected between the two positioning cylinders (21), the ends of piston rods of the two positioning cylinders (21) are fixedly provided with the clamp (22), and the clamp (22) is arranged on the bottom plate (14) in a sliding mode.

2. The automatic loading and unloading mechanism for the punch press as claimed in claim 1, wherein: the conveying device (3) comprises two protective plates (24) and a plurality of rollers (25), the rollers (25) are parallelly and rotatably arranged between the two protective plates (24), and the two protective plates (24) are fixed on the frame (1).

3. The automatic loading and unloading mechanism for the punch press as claimed in claim 1, wherein: the stroke synchronizer (23) is an electromagnetic valve (26), an air inlet of the electromagnetic valve (26) is connected with a tee joint A (27), an air inlet of the positioning air cylinder (21) is communicated with the tee joint A (27) through an air pipe A (65) respectively, an air outlet of the electromagnetic valve (26) is connected with a tee joint B (28), and an air outlet of the positioning air cylinder (21) is communicated with the tee joint B through an air pipe B (66) respectively.

4. The automatic loading and unloading mechanism for the punch press as claimed in claim 1, wherein: the automatic feeding device is characterized in that two guide rails (29) are arranged on the rack (1), a driving motor (30) is arranged on the rack (1), an output end of the driving motor (30) is connected with a driving lead screw (31), a homodromous transmission device (32) is arranged on the driving lead screw (31), the driving lead screw (31) is connected with a driven lead screw (33) through the homodromous transmission device (32), a first sliding block (34) and a second sliding block (35) are in threaded connection on the driving lead screw (31), a third sliding block (36) and a fourth sliding block (37) are in threaded connection on the driven lead screw (33), the first sliding block (34) and the second sliding block (35) are arranged on one guide rail (29) in a sliding mode, the third sliding block (36) and the fourth sliding block (37) are arranged on the other guide rail (29) in a sliding mode, the first sliding block (34) and the third sliding block (36) are connected through a first sliding block (38), the second sliding block (35) and the fourth sliding block (37) are connected through a second bridge (39), the feeding mechanism is arranged on the second bridge (39), and the carrying mechanism (6) is arranged on the second bridge (6).

5. The automatic loading and unloading mechanism for the punch press as claimed in claim 4, wherein: the homodromous transmission device (32) comprises a first bevel gear (40), a second bevel gear (41), a third bevel gear (42), a fourth bevel gear (43) and a connecting rod (44), the driving screw (31) is provided with the first bevel gear (40), the first bevel gear (40) is meshed with the second bevel gear (41), the second bevel gear (41) is rigidly connected with the third bevel gear (42) through the connecting rod (44), the fourth bevel gear (43) is arranged on the driven screw (33), and the third bevel gear (42) is meshed with the fourth bevel gear (43).

6. The automatic loading and unloading mechanism for the punch press as claimed in claim 4, wherein: the feeding and carrying mechanism (5) comprises a feeding cylinder (45) and a feeding sucker (46), the feeding cylinder (45) is fixed on the first bridge (38), and a piston rod of the feeding cylinder (45) is connected with the feeding sucker (46).

7. The automatic loading and unloading mechanism for the punch press as claimed in claim 1, wherein: unloading transport mechanism (6) are including unloading cylinder (47) and stamping workpiece suction means (49), the one end and the stamping workpiece suction means (49) of unloading cylinder (47) piston rod are connected.

8. The automatic loading and unloading mechanism for the punch press as claimed in claim 7, wherein: the bottom of stamping workpiece suction means (49) is provided with central sucking disc (52), and stamping workpiece suction means (49) articulates all around has four first connecting block (53), four first connecting block (53) articulate respectively has second connecting block (54), four first connecting block (53) and four second connecting block (54) bottoms are provided with supplementary sucking disc (55) respectively.

9. The automatic loading and unloading mechanism for the punch press as claimed in claim 1, wherein: anchor clamps (22) include base plate (57), buffer spring (58) and splint (59), base plate (57) and the end fixed connection of location cylinder (21) piston rod, base plate (57) are connected with splint (59) through buffer spring (58), baffle (13) are provided with the through-hole that corresponds with splint (59).

10. The automatic loading and unloading mechanism for the punch press as claimed in claim 1, wherein: stop device (20) include photoelectric switch (19) and limiting plate (60), photoelectric switch (19) set up in limiting plate (60) one side relative with conveyer (3), limiting plate (60) are provided with rack (61) respectively at conveyer (3) one side both ends dorsad, baffle (13) outside is provided with hand wheel (62), the pivot of hand wheel (62) is passed side shield (13) and is extended to another side shield (13), is provided with two limit gear (63) in hand wheel (62) pivot, two limit gear (63) mesh with two rack (61) respectively, be provided with fixed slot (64) on baffle (13).