阅读说明：本技术 基于异形夹钳推块的金属板材冲压成型系统及加工方法 (Sheet metal punch forming system and processing method based on special-shaped clamp push block ) 是由 李光赋 尹华春 于 2021-09-08 设计创作，主要内容包括：本发明公开了基于异形夹钳推块的金属板材冲压成型系统及加工方法,包括冲压装置和进料装置；所述进料装置包括滑动架、用于驱动滑动架移动的移动装置以及用于实现冲压装置进料或出料的气缸,所述滑动架上设置异形夹钳推块,所述异形夹钳推块包括用于实现冲压装置进料的夹钳和用于实现冲压装置出料的第一推块,所述移动装置包括导轨、丝杠、丝杠螺母和电机；所述夹钳包括上夹板、下夹板、上夹钳和下夹钳；本发明利用气缸驱动上夹板的升降,同时控制夹钳的开合和第一推块的转动,实现了新板进料和成品板出料的同时进行,提高了工作效率；以固定上夹钳、活动下夹钳的方式控制夹钳的开合,克服了板材在下料时被拖行的问题,减小了加工误差。(The invention discloses a sheet metal punch forming system and a processing method based on a special-shaped clamp push block, which comprises a punching device and a feeding device, wherein the punching device comprises a punch block, a feeding device and a feeding device; the feeding device comprises a sliding frame, a moving device and an air cylinder, the moving device is used for driving the sliding frame to move, the air cylinder is used for realizing feeding or discharging of the stamping device, a special-shaped clamp push block is arranged on the sliding frame, the special-shaped clamp push block comprises a clamp and a first push block, the clamp is used for realizing feeding of the stamping device, the first push block is used for realizing discharging of the stamping device, and the moving device comprises a guide rail, a lead screw nut and a motor; the clamp comprises an upper clamping plate, a lower clamping plate, an upper clamp and a lower clamp; according to the invention, the cylinder is used for driving the upper clamping plate to lift, and the opening and closing of the clamp and the rotation of the first push block are controlled simultaneously, so that the feeding of a new plate and the discharging of a finished plate are carried out simultaneously, and the working efficiency is improved; the opening and closing of the clamp are controlled in a mode of fixing the upper clamp and moving the lower clamp, the problem that the plate is dragged during blanking is solved, and the processing error is reduced.)

1. Sheet metal stamping forming system based on dysmorphism clamp ejector pad, including stamping device and feed arrangement, stamping device includes framed, lower framed and is used for the drive to go up framed and lower framed hydro-cylinder that realizes the compound die action, its characterized in that: the feeding device comprises a sliding frame, a moving device and an air cylinder, the moving device is used for driving the sliding frame to move, the air cylinder is used for realizing feeding of the stamping device or discharging of the stamping device, a special-shaped clamp push block is arranged on the sliding frame, the special-shaped clamp push block comprises a clamp and a first push block, the clamp is used for realizing feeding of the stamping device, the first push block is used for realizing discharging of the stamping device, and the clamp comprises an upper clamping plate and a lower clamping plate; the lower clamping plate is fixed on the sliding frame, the air cylinder is arranged on the sliding frame, the tail end of a piston rod of the air cylinder is fixedly connected with one end of the upper clamping plate, the other end of the upper clamping plate is hinged with the first pushing block, and the upper clamping plate is connected with the sliding frame in a sliding mode; the moving device comprises a guide rail, a lead screw nut and a motor for driving the lead screw nut to slide along the lead screw; the lead screw is provided with a lead screw nut, the sliding frame is arranged on the lead screw nut, and the sliding frame is connected with the guide rail in a sliding mode.

2. The sheet metal stamping forming system based on profiled clamp ejector pad of claim 1, wherein: the first pushing block comprises a balancing weight, a pushing plate and a butt plate, the balancing weight, the pushing plate and the butt plate are integrally formed, the cross section of the lower clamping plate is L-shaped, the balancing weight is attached to the lower clamping plate when the stamping device feeds materials, and the butt plate is abutted to the lower clamping plate when the stamping device discharges materials.

3. The sheet metal stamping forming system based on profiled clamp ejector pad of claim 1, wherein: the stamping device is characterized in that a motor is arranged on the base, a driving belt pulley is arranged on an output shaft of the motor, a driven belt pulley is arranged on the lead screw, and the driving belt pulley is in transmission connection with the driven belt pulley.

4. The sheet metal stamping forming system based on profiled clamp ejector pad of claim 1, wherein: the clamp comprises an upper clamp and a lower clamp, a second push block is arranged on the upper clamp plate, a third push block, a first connecting rod and a second connecting rod are arranged on the lower clamp plate, the third push block is a wedge-shaped block, the first connecting rod is a V-shaped connecting rod, the second connecting rod is a Z-shaped connecting rod, and the upper clamp is arranged on the lower clamp plate; the inflection point of the first connecting rod is hinged with the lower clamping plate, the middle part of the second connecting rod is hinged with the lower clamping plate, one end of the first connecting rod, which is far away from the third pushing block, is pressed above one end of the second connecting rod, which is close to the third pushing block, and the other end of the second connecting rod is provided with a lower clamp; the third ejector pad and lower plate sliding connection, third ejector pad are close to punch holder one side and are provided with the inclined plane, second ejector pad and inclined plane sliding connection, are provided with the spring between second ejector pad and the lower plate, and the spring both ends are connected with lower plate and second ejector pad respectively.

5. The sheet metal stamping forming system based on dysmorphism clamp ejector pad of claim 4, characterized in that: the first connecting rod is provided with the first torsional spring that is used for realizing that first connecting rod resets with lower plate articulated department, and the second connecting rod is provided with the second torsional spring that is used for realizing that the second connecting rod resets with lower plate articulated department.

6. The processing method for punch forming of the metal plate based on the special-shaped clamp push block is characterized by comprising the following steps of:

s1, feeding: putting a metal plate to be processed into a clamp of a feeding device, wherein the feeding device is positioned at one end of a feeding hole of a stamping device;

s2, synchronous operation of the clamp push block: starting the cylinder, descending the upper clamping plate, and clamping the metal plate by the clamp; meanwhile, the balancing weight of the first pushing block sags, the material pushing plate reaches the groove of the lower die frame of the punching device, and the abutting plate abuts against the lower clamping plate;

s3, synchronous feeding and discharging of the stamping device: starting a motor, enabling a sliding frame of a feeding device to linearly move towards a discharging end of a stamping device along a guide rail, clamping a to-be-processed metal plate by a clamp and feeding the to-be-processed metal plate into the stamping device, and pushing a finished metal plate out of the stamping device by a material pushing plate of a first pushing block;

s4, blanking: the motor is suspended, and the sliding frame is suspended to move; the cylinder is reset, the upper clamping plate is lifted, and the clamp is opened; meanwhile, the first push block resets; the motor resumes working, the sliding frame continues to move towards the discharge hole, and the metal plate to be processed falls into a lower die frame of the stamping device;

s5, resetting the feeding device: the motor rotates reversely, the sliding frame moves reversely, and the whole feeding device resets;

s6, stamping: starting a stamping device to stamp the metal plate;

after completion of step S6, steps S1-S6 are repeated.

7. The processing method for punch forming of the metal plate based on the special-shaped clamp push block as claimed in claim 6, wherein the processing method comprises the following steps: in step S2, after the cylinder is started, the upper clamp plate descends, the second push block moves downward to push the third push block to extend into the lower side of the first connecting rod, the end of the first connecting rod close to the cylinder is lifted, the end far from the cylinder is pressed downward, the end of the second connecting rod close to the first connecting rod is pressed downward, and the end of the second connecting rod far from the first connecting rod is lifted, that is, the lower clamp is lifted, so as to clamp the metal plate; meanwhile, the balancing weight of the first pushing block sags, and the material pushing plate reaches the groove of the lower die frame of the punching device;

in the step S4, the motor is suspended, and the carriage is suspended; the cylinder resets, the upper clamping plate rises, the second pushing block moves upwards, the third pushing block resets under the tension of the spring, the first connecting rod and the second connecting rod reset, and the clamp opens; meanwhile, the first push block resets; and the motor resumes working, the sliding frame continues to move towards the discharge hole, and the metal plate to be processed vertically falls into a lower die frame of the stamping device.

Technical Field

The invention relates to the field of punch forming processing of metal plates, in particular to a metal plate punch forming system and a processing method based on a special-shaped clamp push block.

Background

In the processing procedure of the door plate, the stamping processing of the metal plate is an important procedure, and the metal plate can be assembled into the door plate after the stamping molding of the stamping device. The feeding and discharging of the existing punch forming system are usually completed in a mode that a negative pressure sucker sucks metal plates one by one, the method can only feed or discharge materials for a single plate at a time, time consumption is serious, efficiency is low, and the requirement of large-scale production cannot be met.

Disclosure of Invention

The invention aims to provide a sheet metal punch forming system and a sheet metal punch forming method based on a special-shaped clamp push block, and aims to solve the problems in the background technology.

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

the sheet metal punch forming system based on the special-shaped clamp push block comprises a punching device and a feeding device; the stamping device comprises an upper die frame, a lower die frame and an oil cylinder for driving the upper die frame and the lower die frame to realize die assembly; the feeding device comprises a sliding frame, a moving device for driving the sliding frame to move and an air cylinder for realizing feeding of the stamping device or discharging of the stamping device. The special-shaped clamp pushing block is arranged on the sliding frame and comprises a clamp for feeding the stamping device and a first pushing block for discharging the stamping device, and the clamp comprises an upper clamping plate and a lower clamping plate; the lower clamping plate is fixed on the sliding frame, the air cylinder is arranged on the sliding frame, the tail end of a piston rod of the air cylinder is fixedly connected with one end of the upper clamping plate, the other end of the upper clamping plate is hinged with the first pushing block, and the upper clamping plate is connected with the sliding frame in a sliding mode; the moving device comprises a guide rail, a lead screw nut and a motor for driving the lead screw nut to slide along the lead screw; the lead screw is provided with a lead screw nut, the sliding frame is arranged on the lead screw nut, and the sliding frame is connected with the guide rail in a sliding mode.

The first pushing block comprises a balancing weight, a pushing plate and a butt plate, the balancing weight, the pushing plate and the butt plate are integrally formed, the cross section of the lower clamping plate is L-shaped, the balancing weight is attached to the lower clamping plate when the stamping device feeds materials, and the butt plate is abutted to the lower clamping plate when the stamping device discharges materials.

The stamping device is characterized in that a motor is arranged on the base, a driving belt pulley is arranged on an output shaft of the motor, a driven belt pulley is arranged on the lead screw, and the driving belt pulley is in transmission connection with the driven belt pulley.

The clamp comprises an upper clamp and a lower clamp, a second push block is arranged on the upper clamp plate, a third push block, a first connecting rod and a second connecting rod are arranged on the lower clamp plate, the third push block is a wedge-shaped block, the first connecting rod is a V-shaped connecting rod, the second connecting rod is a Z-shaped connecting rod, and the upper clamp is arranged on the lower clamp plate; the inflection point of the first connecting rod is hinged with the lower clamping plate, the middle part of the second connecting rod is hinged with the lower clamping plate, one end of the first connecting rod, which is far away from the third pushing block, is pressed above one end of the second connecting rod, which is close to the third pushing block, and the other end of the second connecting rod is provided with a lower clamp; the third ejector pad and lower plate sliding connection, third ejector pad are close to punch holder one side and are provided with the inclined plane, second ejector pad and inclined plane sliding connection, are provided with the spring between second ejector pad and the lower plate, and the spring both ends are connected with lower plate and second ejector pad respectively.

The first torsion spring for realizing the resetting of the first connecting rod is arranged at the hinged position of the first connecting rod and the lower clamping plate, and the second torsion spring for realizing the resetting of the second connecting rod is arranged at the hinged position of the second connecting rod and the lower clamping plate.

The processing method for punch forming of the metal plate based on the special-shaped clamp push block comprises the following steps:

s1, feeding: putting a metal plate to be processed into a clamp of a feeding device, wherein the feeding device is positioned at one end of a feeding hole of a stamping device;

s2, synchronous operation of the clamp push block: starting the cylinder, descending the upper clamping plate, and clamping the metal plate by the clamp; meanwhile, the balancing weight of the first pushing block sags, the material pushing plate reaches the groove of the lower die frame of the punching device, and the abutting plate abuts against the lower clamping plate;

s3, synchronous feeding and discharging of the stamping device: starting a motor, enabling a sliding frame of a feeding device to linearly move towards a discharging end of a stamping device along a guide rail, clamping a to-be-processed metal plate by a clamp and feeding the to-be-processed metal plate into the stamping device, and pushing a finished metal plate out of the stamping device by a material pushing plate of a first pushing block;

s4, blanking: the motor is suspended, and the sliding frame is suspended to move; the cylinder is reset, the upper clamping plate is lifted, and the clamp is opened; meanwhile, the first push block resets; the motor resumes working, the sliding frame continues to move towards the discharge hole, and the metal plate to be processed falls into a lower die frame of the stamping device;

s5, resetting the feeding device: the motor rotates reversely, the sliding frame moves reversely, and the whole feeding device resets;

s6, stamping: starting a stamping device to stamp the metal plate;

after completion of step S6, steps S1-S6 are repeated.

In step S2, after the cylinder is started, the upper clamp plate descends, the second push block moves downward, the third push block is pushed to extend into the lower side of the first connecting rod, one end of the first connecting rod close to the cylinder is lifted, one end of the first connecting rod far away from the cylinder is pressed downwards, one end of the second connecting rod close to the first connecting rod is pressed downwards, one end of the second connecting rod far away from the first connecting rod is lifted, namely, the lower clamp is lifted, and the metal plate is clamped; meanwhile, the balancing weight of the first pushing block sags, and the material pushing plate reaches the groove of the lower die frame of the punching device;

in the step S4, the motor is suspended, and the carriage is suspended; the cylinder resets, the upper clamping plate rises, the second pushing block moves upwards, the third pushing block resets under the tension of the spring, the first connecting rod and the second connecting rod reset, and the clamp opens; meanwhile, the first push block resets; and the motor resumes working, the sliding frame continues to move towards the discharge hole, and the metal plate to be processed vertically falls into a lower die frame of the stamping device.

The invention has the beneficial effects that:

1. utilize the lift of cylinder drive punch holder, the feed of opening and shutting in order to realize stamping device of control clamp on the one hand, the rotation of the first ejector pad of on the other hand control is in order to realize stamping device's ejection of compact for new board feeding and finished product board ejection of compact can go on simultaneously, have saved the time of business turn over material, have improved work efficiency, and in addition, the setting of clamp can once centre gripping polylith sheet metal, realizes the simultaneous processing of many boards, further improves production efficiency.

2. Through addding second ejector pad, third ejector pad, first connecting rod and second connecting rod to the mode of fixed upper clamp, activity lower clamp controls opening and shutting of clamp, makes the lower clamp be in the tilt state during the unloading, and sheet metal can fall into lower die frame perpendicularly, has overcome sheet metal and has dragged the problem of going when the unloading, has avoided the inaccuracy of unloading position, has reduced the machining error.

Drawings

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

FIG. 2 is an enlarged view of FIG. 1 at A in accordance with the present invention;

FIG. 3 is a schematic structural diagram of a clamp of the first embodiment of the present invention before clamping a metal plate;

FIG. 4 is a schematic structural view of a clamp according to a first embodiment of the present invention after clamping a metal plate;

FIG. 5 is a schematic structural view of a second embodiment of the present invention before the clamp grips a metal plate;

FIG. 6 is a schematic structural view of a second embodiment of the present invention before the metal plate is clamped by the clamp;

FIG. 7 is an enlarged view at B of FIG. 5 in accordance with the present invention;

fig. 8 is an enlarged view of the invention at C in fig. 5.

In the figure, 1, a sliding frame; 2. a first push block; 3. a cylinder; 4. an upper splint; 5. a lower splint; 6. a lead screw; 7. a lead screw nut; 8. a guide rail; 9. a slider; 10. a motor; 11. a second push block; 12. a third push block; 13. a first link; 14. a second link; 15. an upper clamp; 16. a lower mold frame; 17. a spring.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

Example one

Referring to fig. 1 to 4, a sheet metal stamping forming system and a processing method based on a profiled clamp push block are provided in the embodiment of the present invention:

the sheet metal punch forming system based on the special-shaped clamp push block comprises a punching device and a feeding device; the punching device is a commercially available punching device and is not described in detail herein.

The feeding device comprises a sliding frame 1 and a moving device used for driving the sliding frame 1 to move, the feeding device further comprises an air cylinder 3 used for realizing feeding of the stamping device or discharging of the stamping device, a special-shaped clamp push block is arranged on the sliding frame 1, the special-shaped clamp push block comprises a clamp used for realizing feeding of the stamping device and a first push block 2 used for realizing discharging of the stamping device, and the clamp comprises an upper clamping plate 4 and a lower clamping plate 5; the lower clamping plate 5 is fixed on the sliding frame 1, the cylinder 3 is arranged on the sliding frame 1, the tail end of a piston rod of the cylinder 3 is fixedly connected with one end of the upper clamping plate 4, the other end of the upper clamping plate 4 is hinged with the first push block 2, and the upper clamping plate 4 is in sliding connection with the sliding frame 1; the moving device comprises a guide rail 8, a lead screw 6, a lead screw nut 7 and a motor 10 for driving the lead screw nut 7 to slide along the lead screw 6; the lead screw is characterized in that a lead screw nut 7 is arranged on the lead screw 6, the sliding frame 1 is arranged on the lead screw nut 7, a sliding block 9 is arranged between the sliding frame 1 and the guide rail 8, and the sliding block 9 is connected with the guide rail 8 in a sliding mode.

First ejector pad 2 includes balancing weight, scraping wings and butt plate, balancing weight, scraping wings and butt plate integrated into one piece, and the cross sectional shape of lower plate 5 is the L type, balancing weight and 5 laminating of lower plate during stamping device feeding, butt plate and 5 butts of lower plate during the stamping device ejection of compact.

The punching device base is provided with a motor 10, an output shaft of the motor 10 is provided with a driving belt pulley, a screw 6 is provided with a driven belt pulley, and the driving belt pulley is in transmission connection with the driven belt pulley.

Under the initial condition, motor 10 does not start, and carriage 1 is located the right-hand member feed inlet, and cylinder 3 does not start, refers to fig. 3, and the balancing weight of first ejector pad 2 closely laminates with lower plate 5, and the clamp is in the state of opening, has the space between upper plate 4 and the lower plate 5 to the workman puts into the sheet metal of treating processing.

Referring to fig. 4, after the metal plate is placed in the clamping device, the cylinder 3 is started, the piston rod of the cylinder 3 extends to push the upper clamping plate 4 to move downwards, the distance between the upper clamping plate 4 and the lower clamping plate 5 is gradually reduced, until the upper clamping plate 4 presses the metal plate, the piston rod stops extending, and the clamp is in a clamping state. In the descending process of the upper clamping plate 4, the first pushing block 2 hinged to the upper clamping plate 4 descends together, a gap is formed between the first pushing block 2 and the lower clamping plate 5, at the moment, the counter weight of the first pushing block 2 sags under the action of gravity, the first pushing block 2 rotates along the anticlockwise direction, and when the butt joint plate of the first pushing block 2 is in butt joint with the lower clamping plate 5, the pushing plate of the first pushing block extends into the groove of the lower die frame 16. At the moment, the motor 10 is started, the screw rod 6 rotates, the screw rod nut 7 is driven to do linear motion leftwards along the screw rod 6, and the sliding frame 1 is driven to move leftwards along the guide rail 8 under the action of the sliding block 9; meanwhile, the finished plate punched on the lower die frame 16 is pushed by the first material pushing plate 2 to move to the left.

When the sliding frame 1 moves to the discharge hole at the left end of the stamping device, the finished board is pushed out of the discharge hole and then falls into the material receiving platform. At the moment, the motor 10 is paused, and the sliding frame 1 stops moving; the piston rod of the cylinder 3 contracts to pull the upper clamping plate 4 to ascend, and the first push block 2 moves upwards and rotates clockwise to reset while the clamp is loosened. And starting the motor 10, continuing to move the sliding frame 1 leftwards, dropping the metal plate which is not clamped onto the lower die frame 16 under the action of gravity, and finishing the blanking. At this time, the motor 10 rotates reversely, and drives the lead screw nut 7 to move rightwards along the lead screw 6, so that the sliding frame 1 is driven to move reversely along the guide rail 8 to reset. And after the feeding device is reset, starting the stamping device, and carrying out stamping molding processing on the plate to be processed. In the embodiment of the invention, due to the arrangement of the special-shaped clamp and the first push block 2, the discharging of the finished product plate is completed while the new plate is fed, so that the working efficiency is greatly improved; because the thickness of metal sheet is thinner, the clamp can once only centre gripping polylith panel feeding, realizes the simultaneous processing of polylith board, and the ejection of compact has further improved production efficiency simultaneously.

The processing method for punch forming of the metal plate based on the special-shaped clamp push block comprises the following steps:

s1, feeding: putting a metal plate to be processed into a clamp of a feeding device, wherein the feeding device is positioned at one end of a feeding hole of a stamping device;

s2, synchronous operation of the clamp push block: starting the cylinder 3, descending the upper clamping plate 4, and clamping the metal plate by the clamp; meanwhile, the balancing weight of the first pushing block 2 sags, the material pushing plate reaches the groove of the lower die frame 16 of the punching device, and the abutting plate abuts against the lower clamping plate 5;

s3, synchronous feeding and discharging of the stamping device: starting a motor 10, enabling a sliding frame 1 of the feeding device to linearly move towards the discharge end of the stamping device along a guide rail 8, clamping a to-be-processed metal plate by a clamp and feeding the to-be-processed metal plate into the stamping device, and pushing a finished metal plate out of the stamping device by a material pushing plate of a first pushing block 2;

s4, blanking: the motor 10 is paused, and the sliding frame 1 is paused; the cylinder 3 is reset, the upper clamping plate 4 is lifted, and the clamp is opened; meanwhile, the first push block 2 is reset; the motor 10 resumes working, the sliding frame 1 continues to move towards the discharge hole, and the metal plate to be processed falls into a lower die frame 16 of the stamping device;

s5, resetting the feeding device: the motor 10 rotates reversely, the sliding frame 1 moves reversely, and the whole feeding device resets;

s6, stamping: and starting the stamping device to stamp the metal plate.

After completion of step S6, steps S1-S6 are repeated.

Example two

In the first embodiment, the clamp is further improved on the basis that when a new plate is blanked, the lower clamping plate 5 still supports one end of the metal plate after the clamp is released, and the metal plate can be dragged a small distance to be separated from the clamp opening and fall into the lower die frame 16 along with the leftward movement of the sliding frame 1, so that the blanking position is not accurate enough.

Please refer to fig. 5-8; the difference from the first embodiment is that:

the tongs include an upper tong 15 and a lower tong. The upper clamp plate 4 is provided with a second push block 11, the lower clamp plate 5 is provided with a third push block 12, a first connecting rod 13 and a second connecting rod 14, the third push block 12 is a wedge-shaped block, the first connecting rod 13 is a V-shaped connecting rod, the second connecting rod 14 is a Z-shaped connecting rod, and the upper clamp 15 is arranged on the lower clamp plate 5; the inflection point of the first connecting rod 13 is hinged with the lower clamping plate 5, the middle part of the second connecting rod 14 is hinged with the lower clamping plate 5, one end of the first connecting rod 13, which is far away from the third pushing block 12, is pressed above one end of the second connecting rod 14, which is close to the third pushing block 12, and the other end of the second connecting rod 14 is provided with a lower clamp; third ejector pad 12 and lower plate 5 sliding connection, third ejector pad 12 is provided with the inclined plane near upper plate 4 one side, second ejector pad 11 and inclined plane sliding connection, is provided with spring 17 between second ejector pad 11 and the lower plate 5, and the spring 17 both ends are connected with lower plate 5 and second ejector pad 11 respectively.

Referring to fig. 5, in an initial state, the cylinder 3 is not started, the counter weight block of the first push block 2 is tightly attached to the lower clamping plate 5, the second push block 11, the third push block 12 and the spring 17 are all static, due to the action of gravity, the first connecting rod 13 is in a state that the front end is sagged and the tail end is uplifted, the second connecting rod 14 is in a state that the front end is uplifted and the tail end is sagged, and the clamp is opened.

Referring to fig. 6, after the worker puts the metal plate into the tongs, the cylinder 3 is actuated. A piston rod of the cylinder 3 extends to push the upper clamping plate 4 to move downwards, the first pushing block 2 moves downwards along with the upper clamping plate 4 and rotates anticlockwise under the action of gravity, and a pushing plate of the first pushing block 2 extends into a groove of the lower die frame 16; meanwhile, the second push block 11 fixed on the upper clamping plate 4 moves downwards to push the third push block 12 to move rightwards along the lower clamping plate 5, the spring 17 is stretched, and the tip of the third push block 12 is pushed into a gap between the first connecting rod 13 and the lower clamping plate 5, so that the front end of the first connecting rod 13 is lifted and the tail end of the first connecting rod 13 is pressed downwards; the second link 14 is drooped at the front end under the pressure of the first link 13, and the tip is lifted, and the jaws are gradually tightened to completely grip the metal sheet as the gap between the tip and the upper jaw 15 is gradually reduced.

The motor 10 is started to drive the sliding frame 1 to slide leftwards along the guide rail 8, and the first pushing block 2 pushes the finished plate to discharge while the clamp clamps the plate to feed. When the finished plate is discharged and a new plate needs to be discharged, the motor 10 is paused and the sliding frame 1 is paused; the piston rod of the cylinder 3 is contracted, the upper clamping plate 4 moves upwards, and the first push block 2 moves upwards and rotates clockwise to reset; the second push block 11 moves upwards, the spring 17 contracts and resets, and the third push block 12 is pulled to move leftwards and reset; at the moment, the first connecting rod 13 and the second connecting rod 14 are reset under the action of gravity, the clamp is loosened, the metal plate which loses clamping falls into the lower die frame 16 under the action of gravity, and the blanking is finished. Because the lower clamp is in an inclined state during blanking, the friction force between the metal plate and the lower clamp is extremely small, so that the metal plate can vertically fall, and the dragging problem cannot occur.

Preferably, a first torsion spring for realizing the reset of the first link 13 is arranged at the joint of the first link 13 and the lower clamp plate 5, and a second torsion spring for realizing the reset of the second link 14 is arranged at the joint of the second link 14 and the lower clamp plate 5. When the cylinder 3 is reset, the first torsion spring and the second torsion spring can respectively assist to drive the first connecting rod 13 and the second connecting rod 14 to reset, so that the resetting of the first connecting rod 13 and the second connecting rod 14 is more stable and smooth.

In step S2 of the embodiment, after the cylinder 3 is started, the upper clamp plate 4 descends, the second push block 11 moves downward to push the third push block 12 to extend into the lower side of the first connecting rod 13, one end of the first connecting rod 13 close to the cylinder 3 is lifted up, one end of the first connecting rod 13 far away from the cylinder 3 is pressed down, one end of the second connecting rod 14 close to the first connecting rod 13 is pressed down, one end of the second connecting rod 14 far away from the first connecting rod 13 is lifted up, and the clamp clamps the metal plate; meanwhile, the balancing weight of the first pushing block 2 sags, and the material pushing plate reaches the groove of the lower die frame 16 of the punching device;

in step S4, the motor 10 is stopped, and the carriage 1 is stopped; the cylinder 3 is reset, the upper clamping plate 4 is lifted, the second push block 11 moves upwards, the third push block 12 is reset under the tension of the spring 17, the first connecting rod 13 and the second connecting rod 14 are reset, and the clamp is opened; meanwhile, the first push block 2 is reset; the motor 10 resumes operation, the carriage 1 continues to move towards the discharge opening, and the metal sheet to be processed vertically falls into the lower die frame 16 of the punching device.

The working principle of the invention is as follows: the cylinder 3 is used for driving the upper clamping plate 4 to lift, so that on one hand, the opening and closing of the clamp are controlled to realize the feeding of the stamping device, and on the other hand, the rotation of the first push block 2 is controlled to realize the discharging of the stamping device; the whole sliding frame 1 is controlled to move on the guide rail 8 through the lead screw 6 and the lead screw nut 7, so that the first push block 2 pushes a finished product plate to finish discharging while the clamp clamps a new plate to feed, the feeding and discharging time is shortened, and the working efficiency is improved; by additionally arranging the second push block 11, the third push block 12, the first connecting rod 13 and the second connecting rod 14, the opening and closing of the clamp are controlled in the modes of fixing the upper clamp 15 and moving the lower clamp, so that the lower clamp is in an inclined state during blanking, the metal plate can vertically fall into the lower die frame 16, the problem that the plate is dragged during blanking is solved, the inaccuracy of the blanking position is avoided, and the processing error is reduced.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.