CN115446188A

CN115446188A - Automatic stamping equipment with location safety locking function

Info

Publication number: CN115446188A
Application number: CN202211394825.7A
Authority: CN
Inventors: 司大强; 臧崇运; 张清林
Original assignee: Jiangsu Xingforging Intelligent Equipment Technology Co ltd
Current assignee: Jiangsu Xingforging Intelligent Equipment Technology Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2022-12-09
Anticipated expiration: 2042-11-09
Also published as: CN115446188B

Abstract

The invention discloses automatic stamping equipment with a positioning and safety locking function, which comprises a support, a forming device, a positioning and locking device and a rotary mechanical arm, wherein the support is arranged on a workbench, the support is fixedly connected with the forming device, the forming device is connected with the positioning and locking device, the rotary mechanical arm is arranged on the workbench, the forming device comprises a die holder, an upper die and a lower die, the die holder is fixedly connected with the support, a forming cavity is arranged on the die holder, the lower die is arranged in the forming cavity, the upper die and the lower die are oppositely arranged, the upper die is a male die, the lower die is a female die, after stamping is completed, a workpiece is sunk in a lower parting plane of the female die, the workpiece is subjected to cold deformation stamping, a certain amount of elastic deformation is locally arranged at the tail end of the stamping, the workpiece is stamped and converged from the outer side to the inner side in the stamping process, and under the action of the elastic deformation, the workpiece is limited in the circumferential direction, the workpiece has outward expansion force, so that the workpiece is pressed on the wall surface of the forming cavity, and the workpiece and the automatic demoulding of the workpiece and the upper die is convenient.

Description

Automatic stamping equipment with location safety locking function

Technical Field

The invention relates to the technical field of metal stamping, in particular to automatic stamping equipment with a positioning and safety locking function.

Background

With the continuous development of automation technology, more and more fields begin to use automation equipment as a main force, so that the manual participation is reduced, and the production efficiency is ensured. As the mechanical field with larger use amount of automatic equipment, in the process of deep processing, the processing efficiency and the processing precision can be greatly improved through automatic production, wherein the automatic stamping equipment is also widely applied.

Stamping equipment belongs to the cold forming field, through mould transmission hydraulic power, produces deformation with metal work piece suppression, and metal work piece truns into plastic deformation after via elastic deformation, finally reaches cold forming's purpose. Compared with conventional castings and forged parts, the metal stamping parts are generally thin in thickness and low in strength, the workpieces can generate certain elastic deformation after being deformed, and the workpieces have the tendency of returning to micro deformation under the elastic action, so that mold wrapping force is easily generated on the mold, the formed workpieces are not easy to separate from the mold, and the formed workpieces need to be taken out by a special ejection mechanism. In the continuous use process, the inside of the equipment can generate large abrasion, when a formed workpiece is taken out, the workpiece can generate large friction with the inner wall surface of the equipment under the action of metal elasticity, and when the formed workpiece is taken out forcibly, the workpiece can generate large abrasion, the friction resistance is large, and the continuous production efficiency is influenced.

When the workpiece is demolded, the workpiece generally only moves in one direction, and due to the existence of the mold covering force, the demolding is inconvenient. In addition, because work piece thickness differs among the stamping process, in case the punching press gets too big pressure, not influence the punching press quality, can cause the punching press damage even when serious, reduce the life of equipment.

Disclosure of Invention

The invention aims to provide automatic stamping equipment with a positioning and safety locking function, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides an automatic stamping equipment with location safety locking function, automatic stamping equipment includes the support, forming device, location locking device and rotatory arm, the workstation is arranged in to the support, support and forming device fastening connection, forming device and location locking device connect, rotatory arm is arranged in on the workstation, forming device includes the die holder, go up mould and lower mould, die holder and support fastening connection are equipped with the shaping chamber on the die holder, the shaping intracavity is arranged in to the lower mould, go up the mould and arrange in opposite directions with the lower mould, it is the terrace die to go up the mould, the lower mould is the die.

The support is used as a main supporting foundation, the forming device is installed, the forming device is matched with a mold in a forming cavity in a mold base through an upper mold and a lower mold, punching of a workpiece is completed, after punching is completed, the workpiece is directly conveyed onto a conveyor belt through a rotary mechanical arm, manual participation is reduced, continuous processing efficiency is improved, after the upper mold moves to a punching limit, automatic locking and positioning are performed through a positioning and locking device, parting surfaces are arranged on opposite surfaces of the upper mold and the lower mold, when punching is performed, the upper mold is pressed on the upper surface of the workpiece, the workpiece is punched through hydraulic driving, the upper mold is arranged as a male mold, the lower mold is arranged as a female mold, after punching is completed, the workpiece sinks in a lower parting surface of the female mold, the workpiece is subjected to cold deformation punching, a certain amount of elastic deformation at the local part of a punching end, the workpiece is pressed and converged from the outer side to the inner side in a punching process, and under the action of elastic deformation, the workpiece is limited in the circumferential direction, the workpiece has outward expansion force, so that the workpiece is pressed on the wall surface of the forming cavity, and the workpiece and the upper mold can be automatically demolded conveniently.

Further, go up the mould towards the work piece upside, the shaping chamber is arranged in to the work piece, forming device still includes the pneumatic cylinder, pneumatic cylinder and support fastening connection, the pneumatic cylinder output is connected with last mould transmission, be equipped with the choke groove on the last mould, the pneumatic cylinder includes cylinder body and piston rod, piston rod upper end is through piston and cylinder body inner chamber sliding contact, the piston rod is connected with last mould transmission, be equipped with the pressure-bearing runner on the piston rod, pressure-bearing runner upper end and cylinder body inner chamber intercommunication, pressure-bearing runner lower extreme and choke groove intercommunication, locating component includes the water conservancy diversion subassembly, the water conservancy diversion subassembly is arranged in the choke groove, the water conservancy diversion subassembly includes choke block and resistance spring, choke block and choke groove sliding connection, the resistance spring is arranged in the choke block lower extreme, resistance spring and choke groove bottom surface are connected, choke groove one side is equipped with the discharge way, choke groove and discharge way intermittent type intercommunication, the choke groove import is located the choke block travel of sliding.

When punching is carried out, a workpiece is firstly arranged at the inlet of a forming cavity, an upper die descends under the driving of the hydraulic pressure of a hydraulic cylinder to punch the upper surface of the workpiece and drive the middle part of the workpiece to deform downwards, the hydraulic cylinder is installed through a bracket and is connected with a booster pump through a pipeline, the hydraulic pressure is increased to working pressure through the booster pump and is conveyed to the inner cavity of the cylinder body of the hydraulic cylinder, a piston rod is pushed to descend through a piston under the action of pressure difference so as to drive the upper die to move, overpressure limitation is carried out through a resistance groove on the upper die and a resistance spring and a resistance block which are arranged in the resistance groove, the resistance spring pressure limiting pressure is set according to the requirement of the punching pressure grade, the moving range of the resistance block is arranged at the upper end of the inlet of a discharge channel in the normal punching process, through the wall contact seal of resistance piece and choked flow groove, prevent the pressure release, when the upper die continues down, work piece deformation volume grow gradually, when the work piece warp the lower profile contact of bottom surface and lower mould, for the deformation maximum, the pneumatic cylinder does not just bear work piece deformation pressure, because work piece lower extreme is down obstructed, form the resistance to going down to last mould, along with resistance increase, when exceeding confined pressure, resistance piece both sides pressure differential is enough to overcome resistance spring elasticity, make resistance spring deformation downwards, make the resistance piece cross the import of leaking the passageway, superpressure hydraulic oil flows from leaking the passageway, thereby carry out automatic positioning according to the work piece of different thickness, prevent to remove transfinite, cause the excessive pressure damage, reduce punching press inertia.

Furthermore, the positioning and locking device also comprises a sealing seat, a clamping plate and a telescopic block, wherein the upper die is provided with a plurality of sliding grooves along the circumferential direction, the telescopic block is in sliding connection with the sliding grooves, the discharge channel is provided with a plurality of sliding grooves along the circumferential direction of the flow blocking grooves, the tail end of the discharge channel is provided with a pressure regulating cavity, the sealing seat is in dynamic sealing connection with the pressure regulating cavity, the sealing seat is in transmission connection with the clamping plate through a linkage rod, one end of the linkage rod, close to the clamping plate, penetrates through the telescopic block, the linkage rod is in transmission connection with the telescopic block, the clamping plate is in transmission connection with a workpiece, a plurality of limiting grooves are formed along the wall surface of the forming cavity, and the outer side of the clamping plate is in sliding connection with the limiting grooves;

during stamping: the flow-blocking groove is communicated with the drainage channel and is cut off;

when the pressure is excessive: the flow-blocking groove is communicated with the pressure regulating cavity through the flow-discharging passage.

The workpiece is automatically locked by the positioning and locking device, the blocking block descends in the normal stamping process without communicating the blocking groove with the drainage channel, when the pressure in the blocking groove is over-pressure, namely after the stamping is finished, the blocking block is pushed to continue descending along with the rise of the pressure of the hydraulic oil in the blocking groove until the blocking groove is communicated with the drainage channel, the over-pressure hydraulic oil is decompressed through the drainage channel to avoid the stamping damage to the lower die, the clamping plate is driven to descend in the descending process of the upper die, after the over-pressure, the hydraulic oil is guided to enter the pressure regulating cavity through the drainage channel and flows to a partial space of the pressure regulating cavity between the telescopic block and the sealing seat, the sealing seat is pushed to move inwards along with the rise of the pressure, and the sealing seat drives the telescopic block to move inwards along with the sliding groove through the transmission of the linkage rod, and drive cardboard centering and remove, lock the work piece through the cardboard, through above-mentioned pressure conversion structure, turn into transverse pressure with the vertical power of punching press, and carry out automatic locking to the work piece after the punching press, the locking in-process, the cardboard promotes the port move in on the work piece, overcome work piece deformation spreading force, reduce the contact friction of work piece and shaping chamber wall, reduce the friction damage, the drawing of patterns of mould and lower mould is gone up simultaneously, improve continuity punching press efficiency through two-way drawing of patterns, the punching press is accomplished the back, carry out the joint to the work piece through the cardboard of last mould circumference arrangement, along with last mould goes upward drive the work piece and shifts up, the port does not carry out the crimping to the shaping chamber wall on the work piece this moment.

Furthermore, the communication position of the drainage channel and the pressure regulating cavity is positioned on one side of the sealing seat close to the telescopic block;

during locking: the clamping plate faces towards the outer side wall of the workpiece.

After the punching press is accomplished, carry out the crimping to the work piece simultaneously through the cardboard that circumference was arranged, make the work piece upper end mouth not carry out the crimping to the die cavity wall, reduce friction loss, improve automatic drawing of patterns efficiency, go up the work piece drawing of patterns that drives after the punching press on the mould, carry out the centre gripping to the work piece after the punching press through the rotating machinery arm, pressure regulating intracavity inscribes the back flow, and the back is accomplished in the centre gripping, carries the oil tank of boost pump with the hydraulic oil in the pressure regulating intracavity, recycles.

As optimization, the limiting groove inlet is provided with a transition cambered surface facing the outer side wall of the clamping plate. The spacing groove leads the cardboard down through the transition arc, avoids cardboard deformation in the continuous use process, directly leads to the fact the cardboard striking impaired down.

As optimization, the material surface is arranged on the outer side of the lower end of the clamping plate in an inclined mode and faces towards the transition cambered surface. The material surface is enabled to improve the downward transition smoothness of the clamping plate through the inclined arrangement, the continuous stamping efficiency is improved, the width of the lower end of the material surface is smaller than that of the upper end, and during the limiting position, the material surface is enabled to be in sliding guide through the transition arc surface.

Preferably, a pressure limiting stroke is arranged along the gliding direction of the resistance spring. The resistance spring can be a plate spring, the overrun pressure is determined through the plate spring, and meanwhile the plate spring is in contact with the wall surface of the flow resisting groove when moving downwards to perform sliding guide.

As optimization, the number of the clamping plates is not less than two, and the clamping plates are distributed along the circumferential direction of the upper die at equal intervals. The cardboard is two at least, makes the cardboard balanced to the work piece application of force, prevents that the work piece from receiving the deviational force, makes the unilateral crimping of work piece at the die cavity wall that lasts, influences drawing of patterns efficiency.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, a workpiece is stamped through hydraulic drive, the upper die is set as a male die, the lower die is set as a female die, after stamping is finished, the workpiece sinks in a lower parting surface of the female die, the workpiece is subjected to cold deformation stamping, a certain amount of elastic deformation is locally formed at the stamping end, the workpiece is stamped and converged from the outer side to the inner side in the stamping process, and under the action of the elastic deformation, the workpiece has outward expansion force due to the fact that the circumferential direction of the workpiece is limited, so that the workpiece is pressed on the wall surface of a forming cavity, and the workpiece and the upper die can be conveniently subjected to automatic demoulding; when the upper die continues to move downwards, the deformation amount of the workpiece is gradually increased, when the workpiece deforms to the bottom surface and is in contact with the lower profile surface of the lower die, the maximum deformation amount is reached, the hydraulic cylinder does not bear the deformation pressure of the workpiece, the lower end of the workpiece is blocked to move downwards, resistance is formed when the upper die moves downwards, along with the increase of the resistance, when the limited pressure is exceeded, the pressure difference between two sides of the block is enough to overcome the elastic force of the resistance spring, the resistance spring is enabled to deform downwards, the block is enabled to cross the inlet of the flow discharge channel, overpressure hydraulic oil flows out of the flow discharge channel, therefore, the workpiece with different thicknesses is automatically positioned, the movement overrun is prevented, the overpressure damage is caused, and the stamping inertia is reduced; after the superpressure, hydraulic oil gets into the pressure regulating intracavity through the discharge flow way water conservancy diversion, and in the partial space in the pressure regulating chamber between to flexible piece and the seal receptacle, rise along with pressure, promote the seal receptacle and move to the inboard, the seal receptacle drives flexible piece along the spout internal movement through the link rod transmission, and drive the cardboard centering and move, lock the work piece through the cardboard, through above-mentioned pressure conversion structure, turn into the vertical force of punching press horizontal pressure, and carry out automatic locking to the work piece after the punching press, the cardboard promotes the work piece on the port internal movement, overcome work piece deformation expansion force, reduce the contact friction of work piece and shaping chamber wall, reduce the friction damage, the drawing of patterns of mould and lower mould is gone on simultaneously, improve continuity punching press efficiency through two-way drawing of patterns.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the general structure of the present invention;

FIG. 2 is a schematic representation of the power transmission of the present invention;

FIG. 3 is a schematic view of the upper die structure of the present invention;

FIG. 4 is an enlarged view of portion A of the view of FIG. 3;

FIG. 5 is a schematic view of the clamp of the present invention;

FIG. 6 is an enlarged view of portion B of the view of FIG. 2;

in the figure: 1-support, 2-forming device, 21-die holder, 211-forming cavity, 212-limiting groove, 2121-transition arc surface, 22-upper die, 221-pressure regulating cavity, 222-flow blocking groove, 223-flow releasing channel, 224-sliding groove, 23-lower die, 24-hydraulic cylinder, 241-cylinder body, 242-piston rod, 2421-pressure bearing channel, 3-positioning locking device, 31-flow guiding component, 311-block, 312-resistance spring, 32-sealing seat, 33-clamping plate, 331-material-letting surface, 34-linkage rod, 35-telescopic block, 4-rotary mechanical arm and 5-workpiece.

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.

The invention provides the technical scheme that:

as shown in fig. 1 to fig. 3, an automatic stamping device with a positioning and safety locking function includes a support 1, a forming device 2, a positioning and locking device 3, and a rotary mechanical arm 4, where the support 1 is placed on a workbench, the support 1 is fastened to the forming device 2, the forming device 2 is connected to the positioning and locking device 3, the rotary mechanical arm 4 is placed on the workbench, the forming device 2 includes a die holder 21, an upper die 22 and a lower die 23, the die holder 21 is fastened to the support 1, a forming cavity 211 is formed in the die holder 21, the lower die 23 is placed in the forming cavity 211, the upper die 22 and the lower die 23 are arranged in opposite directions, the upper die 22 is a male die, and the lower die 23 is a female die.

The support 1 is used as a main supporting foundation and is used for installing the forming device 2, the forming device 2 is matched in a forming cavity 211 in a die holder 21 through an upper die 22 and a lower die 23 to complete stamping of a workpiece 5, after stamping is completed, the workpiece is directly fed onto a conveyor belt through a rotary mechanical arm 4, manual participation is reduced, and continuous processing efficiency is improved.

As shown in fig. 2 to 6, the upper die 22 faces the upper side of the workpiece 5, the workpiece 5 is placed in the forming cavity 211, the forming device 2 further includes a hydraulic cylinder 24, the hydraulic cylinder 24 is fastened to the bracket 1, an output end of the hydraulic cylinder 24 is in transmission connection with the upper die 22, the upper die 22 is provided with a flow blocking groove 222, the hydraulic cylinder 24 includes a cylinder body 241 and a piston rod 242, an upper end of the piston rod 242 is in sliding contact with an inner cavity of the cylinder body 241 through the piston, the piston rod 242 is in transmission connection with the upper die 22, the piston rod 242 is provided with a pressure-bearing flow passage 2421, an upper end of the pressure-bearing flow passage 2421 is communicated with the inner cavity of the cylinder body 241, the lower end of the pressure-bearing flow passage 2421 is communicated with the flow blocking groove 222, the positioning and locking device 3 comprises a flow guide assembly 31, the flow guide assembly 31 is arranged in the flow blocking groove 222, the flow guide assembly 31 comprises a block 311 and a resistance spring 312, the block 311 is in sliding connection with the flow blocking groove 222, the resistance spring 312 is arranged at the lower end of the block 311, the resistance spring 312 is connected with the bottom surface of the flow blocking groove 222, one side of the flow blocking groove 222 is provided with a flow release passage 223, the flow blocking groove 222 is intermittently communicated with the flow release passage 223, and an inlet of the flow blocking groove 222 is positioned in the sliding stroke of the block 311.

When punching is carried out, a workpiece 5 is firstly arranged at the inlet of a forming cavity 211, an upper die 22 descends under the driving of the hydraulic pressure of a hydraulic cylinder 24 to punch the upper surface of the workpiece 5 and drive the middle part of the workpiece 5 to descend for deformation, the hydraulic cylinder 24 is installed through a bracket 1, the hydraulic cylinder 24 is connected with a booster pump through a pipeline, the hydraulic pressure is increased to working pressure through the booster pump and is conveyed to the inner cavity of a cylinder body 241 of the hydraulic cylinder 24, a piston rod 242 is pushed to descend through a piston under the action of pressure difference, so that the upper die 22 is driven to move, overpressure limiting is carried out through a flow blocking groove 222 on the upper die 22, a resistance spring 312 and a resistance block 311 which are arranged in the flow blocking groove 222, the pressure limiting pressure of the resistance spring 312 is set according to the requirement of the punching pressure, and the moving range of the resistance block 311 is arranged at the upper end of the inlet of a discharge passage 223 in the normal punching process, the blocking block 311 is sealed in contact with the wall surface of the flow resisting groove 222 to prevent pressure relief, when the upper die 22 continues to move downwards, the deformation amount of the workpiece is gradually increased, when the workpiece 5 deforms to the bottom surface and contacts with the lower profile of the lower die 23, the maximum deformation amount is achieved, the hydraulic cylinder 24 does not bear the deformation pressure of the workpiece 5, as the lower end of the workpiece 5 is blocked downwards, resistance is formed when the upper die 22 moves downwards, along with the increase of the resistance, when the limited pressure is exceeded, the pressure difference between the two sides of the blocking block 311 is enough to overcome the elastic force of the resistance spring 312, the resistance spring 312 deforms downwards, the blocking block 311 crosses the inlet of the flow discharging passage 223, overpressure hydraulic oil flows out of the flow discharging passage 223, and therefore automatic positioning is carried out according to the workpieces 5 of different thicknesses, movement overrun is prevented, overpressure damage is caused, and stamping inertia is reduced.

As shown in fig. 3 to 5, the positioning and locking device 3 further includes a sealing seat 32, a clamping plate 33 and a telescopic block 35, the upper die 22 is provided with a plurality of sliding grooves 224 along the circumferential direction, the telescopic block 35 is slidably connected with the sliding grooves 224, a plurality of discharge channels 223 are provided along the circumferential direction of the flow blocking groove 222, the tail end of the discharge channel 223 is provided with a pressure regulating cavity 221, the sealing seat 32 is movably and hermetically connected with the pressure regulating cavity 221, the sealing seat 32 is in transmission connection with the clamping plate 33 through a linkage rod 34, one end of the linkage rod 34 close to the clamping plate 33 penetrates through the telescopic block 35, the linkage rod 34 is in transmission connection with the telescopic block 35, the clamping plate 33 is in transmission connection with the workpiece 5, a plurality of limiting grooves 212 are provided along the wall surface of the forming cavity 211, and the outer side of the clamping plate 33 is slidably connected with the limiting grooves 212;

during stamping: the flow blocking groove 222 is communicated with the drainage channel 223 and is cut off;

when the pressure is over-pressure: the blocking flow groove 222 communicates with the pressure regulating chamber 221 through the bleed flow passage 223.

The workpiece 5 is automatically locked through the positioning and locking device 3, the blocking block 311 descends to prevent the blocking groove 222 and the drainage channel 223 from being communicated in the normal punching process, when the pressure in the blocking groove 222 is over-pressurized, namely after punching is finished, the blocking block 311 is pushed to continue descending along with the pressure rise of the hydraulic oil in the blocking groove 222 until the blocking groove 222 and the drainage channel 223 are communicated, the over-pressurized hydraulic oil is decompressed through the drainage channel 223 to avoid punching damage to the lower die 23, the clamping plate 33 is driven to descend in the descending process of the upper die 22, the hydraulic oil is guided into the pressure regulating cavity 221 through the drainage channel 223 after over-pressurization and flows to the partial space of the pressure regulating cavity 221 between the telescopic block 35 and the seal seat 32, and the seal seat 32 is pushed to move inwards along with the pressure rise, seal receptacle 32 drives flexible piece 35 through the transmission of gangbar 34 and moves in spout 224, and drive cardboard 33 centering and move, lock work piece 5 through cardboard 33, through above-mentioned pressure conversion structure, turn into the vertical power of punching press into transverse pressure, and carry out automatic locking to the work piece after the punching press, in the locking process, cardboard 33 promotes work piece 5 upper port and moves in, overcome work piece 5 deformation expansion force, reduce the contact friction of work piece 5 and shaping chamber 211 wall, reduce the friction damage, go on the drawing of patterns of mould 22 and lower mould 23 simultaneously, improve continuity punching press efficiency through two-way drawing of patterns, after the punching press is accomplished, carry out the joint through cardboard 33 of going up mould 22 circumference and arranging work piece 5, it shifts up to drive work piece 5 along with going up of mould 22, work piece 5 upper port does not carry out the crimping to shaping chamber 211 upper wall this moment.

As shown in fig. 3 to 5, the communication position of the drainage channel 223 and the pressure regulating cavity 221 is located on one side of the seal seat 32 close to the telescopic block 35;

during locking: the catch plate 33 faces the outer side wall of the workpiece 5.

After the punching is completed, the workpiece 5 is simultaneously pressed and connected through the clamping plate 33 arranged in the circumferential direction, so that the wall surface of the forming cavity 211 is not pressed and connected through an upper port of the workpiece 5, the friction loss is reduced, the automatic demoulding efficiency is improved, the upper die 22 moves upwards to drive the workpiece 5 after punching to be demoulded, the workpiece after punching is clamped through the rotary mechanical arm 4, the return pipe is connected in the pressure regulating cavity 221 in an inscribed mode, and after the clamping is completed, hydraulic oil in the pressure regulating cavity 221 is conveyed to an oil tank of a booster pump for recycling.

Preferably, the inlet of the limiting groove 212 is provided with a transition arc surface 2121, and the transition arc surface 2121 faces the outer side wall of the clamping plate 33. The limiting groove 212 guides the clamping plate 33 downwards through the transition cambered surface 2121, so that the clamping plate 33 is prevented from being deformed in the continuous use process and directly downwards causing the clamping plate 33 to be impacted and damaged.

Preferably, the material level 331 is disposed outside the lower end of the clamping plate 33, and the material level 331 is disposed obliquely so that the material level 331 faces the transition cambered surface 2121. The inclined material surface 331 improves the downward transition smoothness of the clamping plate 33, improves the continuous stamping efficiency, and ensures that the width of the lower end of the material surface 331 is smaller than that of the upper end, and the material surface 331 is guided to slide through the transition cambered surface 2121 during the extreme position.

Preferably, a pressure limiting stroke is set along the sliding direction of the resistance spring 312. The resistance spring 312 may be a plate spring, and determines an overrun pressure by the plate spring, and makes the plate spring contact with the wall surface of the choke groove 222 when the plate spring descends, so as to perform sliding guidance.

Preferably, the number of the clamping plates 33 is not less than two, and the clamping plates 33 are equidistantly distributed along the circumferential direction of the upper die 22. The clamping plates 33 are at least two, so that the clamping plates 33 apply force to the workpiece 5 in a balanced manner, the workpiece 5 is prevented from being biased, and the single side of the workpiece 5 is continuously pressed on the wall surface of the forming cavity 211 to influence the demolding efficiency.

The working principle of the invention is as follows: the workpiece is punched through hydraulic driving, the upper die 22 is arranged as a male die, the lower die 23 is arranged as a female die, after punching is completed, the workpiece 5 sinks in a lower parting surface of the female die, the workpiece 5 is punched and converged from the outer side to the inner side in the punching process, and under the action of elastic deformation, as the workpiece 5 is limited in the circumferential direction, the workpiece 5 has outward expansion force, so that the workpiece 5 is pressed on the wall surface of the molding cavity 211, and automatic demolding of the workpiece 5 and the upper die 22 is facilitated; when the upper die 22 continues to move downwards, the deformation amount of the workpiece is gradually increased, when the workpiece 5 deforms to the bottom surface and contacts with the lower profile surface of the lower die 23, the maximum deformation amount is reached, the hydraulic cylinder 24 does not bear the deformation pressure of the workpiece 5, the lower end of the workpiece 5 is prevented from moving downwards, resistance is formed when the upper die 22 moves downwards, along with the increase of the resistance, when the limited pressure is exceeded, the pressure difference between two sides of the block 311 is enough to overcome the elastic force of the resistance spring 312, the resistance spring 312 is enabled to deform downwards, the block 311 is enabled to cross the inlet of the relief passage 223, overpressure hydraulic oil flows out of the relief passage 223, and therefore automatic positioning is carried out according to the workpieces 5 with different thicknesses, movement exceeding limit is prevented, overpressure damage is caused, and stamping inertia is reduced; after overpressure, hydraulic oil is guided to enter the pressure regulating cavity 221 through the flow discharging channel 223 and flows to a part of space of the pressure regulating cavity 221 between the telescopic block 35 and the sealing seat 32, the sealing seat 32 is pushed to move inwards along with pressure rising, the sealing seat 32 drives the telescopic block 35 to move inwards along the sliding groove 224 through transmission of the linkage rod 34 and drives the clamping plate 33 to move in a centering manner, the workpiece 5 is locked through the clamping plate 33, through the pressure conversion structure, the vertical force of stamping is converted into transverse pressure, the stamped workpiece is automatically locked, the clamping plate 33 pushes the upper port of the workpiece 5 to move inwards, the deformation expansion force of the workpiece 5 is overcome, the contact friction between the workpiece 5 and the wall surface of the forming cavity 211 is reduced, stripping of the upper die 22 and the lower die 23 is carried out simultaneously, and the continuous stamping efficiency is improved through bidirectional stripping.

It is noted that, herein, 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.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an automatic stamping equipment with fix a position safe locking function which characterized in that: the automatic stamping equipment comprises a support (1), a forming device (2), a positioning and locking device (3) and a rotary mechanical arm (4), wherein the support (1) is arranged on a workbench, the support (1) is fixedly connected with the forming device (2), the forming device (2) is connected with the positioning and locking device (3), the rotary mechanical arm (4) is arranged on the workbench, the forming device (2) comprises a die holder (21), an upper die (22) and a lower die (23), the die holder (21) is fixedly connected with the support (1), a forming cavity (211) is formed in the die holder (21), the lower die (23) is arranged in the forming cavity (211), the upper die (22) and the lower die (23) are oppositely arranged, the upper die (22) is a male die, and the lower die (23) is a female die;

the upper die (22) faces the upper side of the workpiece (5), the workpiece (5) is arranged in the forming cavity (211), the forming device (2) further comprises a hydraulic cylinder (24), the hydraulic cylinder (24) is fixedly connected with the support (1), the output end of the hydraulic cylinder (24) is in transmission connection with the upper die (22), the upper die (22) is provided with a flow resistance groove (222), the hydraulic cylinder (24) comprises a cylinder body (241) and a piston rod (242), the upper end of the piston rod (242) is in sliding contact with the inner cavity of the cylinder body (241) through a piston, the piston rod (242) is in transmission connection with the upper die (22), the piston rod (242) is provided with a pressure-bearing flow channel (2421), the upper end of the pressure-bearing flow channel (2421) is communicated with the inner cavity of the cylinder body (241), the lower end of the pressure-bearing flow channel (2421) is communicated with the flow resistance groove (222), the positioning and locking device (3) comprises a flow guide assembly (31), the flow guide assembly (31) is arranged in the flow resistance groove (222), the flow guide assembly (31) comprises a resistance block (311) and a resistance spring (223), the flow resistance spring (311) and a flow resistance groove (312), the resistance spring (312) is arranged on one side of which is connected with the flow resistance groove (223), the flow blocking groove (222) is intermittently communicated with the drainage channel (223), and an inlet of the flow blocking groove (222) is positioned in the sliding stroke of the block (311).

2. The automatic punching equipment with positioning and safety locking functions as claimed in claim 1, wherein: the positioning and locking device (3) further comprises a sealing seat (32), a clamping plate (33) and a telescopic block (35), a plurality of sliding grooves (224) are formed in the upper die (22) along the circumferential direction, the telescopic block (35) is in sliding connection with the sliding grooves (224), a plurality of leakage channels (223) are formed in the circumferential direction of a flow blocking groove (222), a pressure regulating cavity (221) is formed in the tail end of each leakage channel (223), the sealing seat (32) is in dynamic sealing connection with the pressure regulating cavity (221), the sealing seat (32) is in transmission connection with the clamping plate (33) through a linkage rod (34), one end, close to the clamping plate (33), of the linkage rod (34) penetrates through the telescopic block (35), the linkage rod (34) is in transmission connection with the telescopic block (35), the clamping plate (33) is in transmission connection with a workpiece (5), a plurality of limiting grooves (212) are formed in the wall surface of the forming cavity (211), and the outer side of the clamping plate (33) is in sliding connection with the limiting grooves (212);

during stamping: the flow blocking groove (222) is communicated with the drainage channel (223) and is cut off;

when the pressure is over-pressure: the flow blocking groove (222) is communicated with the pressure regulating cavity (221) through a drain passage (223).

3. The automatic punching equipment with positioning and safety locking functions as claimed in claim 2, wherein: the communication part of the leakage channel (223) and the pressure regulating cavity (221) is positioned on one side of the sealing seat (32) close to the telescopic block (35);

during locking: the clamping plate (33) faces the outer side wall of the workpiece (5).

4. The automatic punching equipment with positioning and safety locking functions as claimed in claim 3, wherein: an inlet of the limiting groove (212) is provided with a transition arc surface (2121), and the transition arc surface (2121) faces the outer side wall of the clamping plate (33).

5. The automatic punching equipment with positioning and safety locking functions as claimed in claim 4, wherein: the outer side of the lower end of the clamping plate (33) is provided with a material surface (331), the material surface (331) is obliquely arranged, and the material surface (331) faces to the transition cambered surface (2121).

6. The automatic punching equipment with positioning and safety locking functions as claimed in claim 5, wherein: and a pressure limiting stroke is arranged along the sliding direction of the resistance spring (312).

7. The automatic punching equipment with positioning safety locking function according to claim 6, characterized in that: the number of the clamping plates (33) is not less than two, and the clamping plates (33) are distributed along the circumferential direction of the upper die (22) at equal intervals.