CN117399485A - Hardware die punching machine with high safety - Google Patents

Abstract

The invention relates to the technical field of punching machines, in particular to a hardware die punching machine with high safety, which comprises: the device comprises a frame, wherein a motor is arranged in the frame, a main shaft is arranged in the frame, a brake is arranged on the main shaft, a transmission device is connected to the main shaft, the frame is provided with a foot switch, a punch is movably connected to the frame, and a workbench is arranged on the frame; the automatic punching machine is characterized in that an induction device is fixedly arranged on the workbench and used for controlling the punch to fall down, the induction device comprises a pressing plate and a safety grating, a pushing device is arranged above the pressing plate, and when the punch is stopped from falling down by the safety grating, the pushing device is started to push a hand on the pressing plate away from the punching machine. According to the invention, when the safety device stops the punching machine, the hand of a worker is pushed away or the speed of the hand extending to the punching area is synchronously slowed down, so that the induction device can ensure that the hands of the worker cannot extend into the punching area before the punching is completely stopped, and the safety of the punching machine is improved.

Description

Hardware die punching machine with high safety

Technical Field

The invention relates to the technical field of punching machines, in particular to a hardware die punching machine with high safety.

Background

The hardware die stamping is a process for deforming or breaking stainless steel, iron, aluminum, copper and other plates and foreign materials by using a punch and a die to achieve a certain shape and size. The method has the advantages of low cost, high speed and the like, and can produce a large number of identical metal parts. The hardware stamping process is widely applied to the production of automobile parts and electrical parts.

At present, in the domestic electronic production industry and the household appliance production industry, most of the enterprises are labor-intensive, and stamping machines are widely applied in the production process. Because full-automatic production equipment is high in price and large in occupied area, full-automatic cost is high, a factory still relies on manpower to feed and take materials, and a human hand is inevitably close to a dangerous area of the stamping machine. The stamping machine has a high risk, and a large number of safety protection devices are used for the stamping machine in order to protect the personal safety of operators to the greatest extent. Currently, safety devices widely used in press production mainly include a two-hand push button type device and an optoelectronic type safety device.

However, in production, the dimensions of the mould need to be changed continuously due to the variation in production requirements of the product, and changing the dimensions of the material sheets is relatively cumbersome, so that they often do not match the dimensions of the mould. For example, when small parts are punched, the web is much larger than the die, which results in tilting of the web on the die, so that a worker needs to manually hold the web during continuous feeding to prevent tilting thereof, to ensure that the web is in the correct position and to ensure stability of punching quality, and to move the web during continuous punching for the next round of punching. In this case, a two-handed push button type safety device is employed, which means that a worker cannot use the hand web, thereby affecting the punching production, so that it is difficult to adapt the two-handed push button type safety device to the production. When the safety grating is adopted, as the hand-held material sheet is used, the hand of a worker and the material sheet are always in the vicinity of a mechanical dangerous area, and when the worker manually holds the material sheet, the distance between the hand of the worker and the dangerous area of the punching machine is insufficient to meet the safety distance required by the safety grating to send a signal to the punching machine for response, the punching machine cannot be stopped before injury is caused to the worker in time, so that the hand of the worker cannot be protected sufficiently in the punching process.

Therefore, the two punching machine safety devices do not meet the production requirements of the production mode, and the applicability under the working condition is low, so that the safety in the production of small punched parts is reduced.

Therefore, the hardware die punching machine is high in safety.

Disclosure of Invention

The invention aims to provide a hardware die punching machine with high safety, which improves the applicability of a safety device in manual continuous feeding and improves the safety of manual continuous feeding of workers.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a high security hardware die stamping machine, comprising: the machine comprises a machine frame, wherein a motor is arranged in the machine frame, a main shaft is arranged in the machine frame, a brake is arranged on the main shaft, a transmission device is connected to the main shaft, a foot switch is arranged on the machine frame, a punch is movably connected to the machine frame, an upper die is fixedly arranged at the lower end of the punch, a workbench is arranged on the machine frame, and a lower die is fixedly arranged on the workbench;

the method is characterized in that: be equipped with the base on the workstation, be equipped with the fixed block on the base, be equipped with the restriction piece on the base, fixed mounting has induction system on the restriction piece, induction system control stopper stops the drift whereabouts, induction system includes clamp plate and safety grating, the clamp plate top is equipped with pushes away from the device, the clamp plate is limited workman's arm and pushes away the device in the push away the scope of device and for pushing away from the device energy storage, safety grating detects behind the staff is close to dangerous region braking drift, starts simultaneously and pushes away the staff that the device was pushed away the clamp plate on with the staff and pushes away the punching machine.

It should be noted that, at present, a limit block is defined as a safety area from the limit block to the worker side; the upper and lower die closing range is defined as a dangerous area; the safety region and the danger region are defined as braking regions.

Based on the scheme, the general working principle is as follows: before stamping, the height of the limiting block is enabled to be horizontal with the die through the adjusting device, the two hands of a worker are blocked through the limiting block, the limiting block is arranged to divide a safe area of safe movement of the worker, the worker presses the pressing plate, the sensing device controls the brake to be closed when the two hands or arms are identified to be placed on the pressing plate, the brake releases locking of the main shaft, the pedal switch is stepped on, and the punch moves downwards to drive the upper die and the lower die to be closed. In addition, in the downward rotation process of the pressing plate, the pressing plate drives the pushing device to shrink; if at least one hand extends to a dangerous area of the punching machine in the punching process, the sensing device controls the brake to be started, the brake controls the main shaft to be locked, the punch stops moving, and the upper die and the lower die are prevented from being closed. In addition, the sensing device starts a pushing-away device, and the pushing-away device pushes the worker away from the punching machine.

Through this design, through clamp plate and induction system cooperation, the workman carries out in the pay-off in-process, forces the workman both arms to press on the clamp plate, otherwise stops punching machine work. Through both hands and foot switch cooperation, start the punching machine, prevent that the workman from getting material or under other special conditions, when the hand is close to the mould, the mistake is stepped on foot switch, and the mould compound die, and then avoid the workman's hand to fail in time to take out and cause the incident to reach the effect of similar both hands switch. The induction device is matched with the pushing-away device, energy is stored through the action of pressing the pressing plate by a worker, and when the induction device stops the punching machine, the hand of the worker is pushed away or the speed of the hand extending to a dangerous area is slowed down, so that the induction device can ensure that the hands of the worker cannot extend into the dangerous area before the complete stop of the punching, and the safety of the punching machine is improved.

Preferably, the induction device comprises two safety gratings vertically arranged on the limiting block, the bottom ends of the safety gratings are 15mm higher than the top ends of the limiting block, two pressing plates are rotatably arranged on the limiting block, two baffle plates are arranged on the pressing plates, two side plates are arranged on two sides of each pressing plate, four pulling rods are arranged on the side plates, springs II are sleeved on the pulling rods, the pulling rods are connected with the pressing plates through connecting ropes, the pulling rods are connected with the pressing plates through the connecting ropes, when the springs II only retract the pressing plates to be under the gravity, the baffle plates are located between the two safety gratings, and in the state of being fully compressed, the baffle plates are separated from detection areas between the two safety gratings.

The working principle is that when a worker feeds materials, the pressing plates are pressed down by two hands, the pressing plates rotate downwards to drive the baffle plates to rotate, the baffle plates are separated from the detection range of the safety grating, the pressing machine releases the braking state, and meanwhile, the pressing plates move the pull rods through the connecting ropes, and the pull rods compress the second springs; after the hands of a worker leave the pressing plate, the second spring returns under the action of the elastic force, the second spring pushes the pull rod, the pull rod returns the pressing plate through the connecting rope, the baffle plate enters the inspection range of the safety grating again, and the punching machine is in a braking state again.

It should be noted that, in order to ensure that the tablet will not block the safety grating to stop the punching machine, the safety grating is raised, the area through which the tablet passes is provided, and the maximum thickness of the tablet that is generally punched is 10mm, so the height of the area is at least 10mm, and in order to avoid that the tablet is actively blocked by the safety grating when pushing the tablet, 50% of the allowance is reserved on the basis, so the bottom end of the safety grating is higher than the top end of the limiting block by 15mm. When one rope fails, other ropes can still work normally, and the normal operation of the device is ensured. The scheme can better protect the safety of a user and improve the reliability of the pushing-away device.

Through the cooperation of clamp plate and safety grating for the workman just can start the punching machine when pressing the clamp plate through the arm, thereby limit workman's hand or arm on the clamp plate in the punching press process, guarantee to be in the hand of workman and be in safe position when punching press. In addition, when a worker takes a material, the pedal switch may be erroneously stepped on, which may cause the press to close the die, causing damage to the worker's hand or body. Through this design for the workman just can start the punching machine when pressing the clamp plate through the arm, and because the restriction of safety grating, make the workman when pressing the clamp plate time hand and stretching to the punching machine, can stop the punching machine equally, so that guarantee to be in the workman's hand when punching press and be in safe position. After the hands of workers are separated from the pressing plate, the baffle plate can automatically reset and trigger the safety grating signal, so that the operation of the punching machine is stopped, and the risk of injury is avoided. The side plates arranged on the two sides of the pressing plate separate the two pressing plates so as to prevent a worker from being able to press the two pressing plates simultaneously by using only one hand.

Preferably, the pushing device comprises an electromagnet arranged on the pull rod, the electromagnet is electrically connected with the safety grating, two side plates are respectively provided with a pushing block, iron sheets matched with the electromagnet are arranged on the pushing blocks, a plurality of pushing ropes are connected between the two pushing blocks, a sliding groove used for enabling the pushing blocks to move along a certain track is formed in the side plates, a first spring is arranged between the pushing blocks and the sliding groove, and the sliding groove is inclined upwards towards one end of a person.

The working principle is that when the pressing plate is pressed, the baffle plate still shields the safety grating, the safety grating controls the electromagnet to cut off power, and the electromagnet cannot attract the iron sheet on the push block, so that the pull rod cannot drive the push rod to move in the downward rotation process of the pressing plate; when the baffle does not shade the safety grating any more, the safety grating controls the electromagnet to electrify, the electromagnet attracts the iron sheet on the push block, the pull rod is attracted with the push block, the push block is driven to move in the moving process of the pull rod, and the push block compresses the first spring; when the arm still presses the pressing plate but the hand triggers the safety grating, the safety grating controls the electromagnet to cut off the power, the electromagnet can not attract the iron sheet on the push block, and the push block is separated from the pull rod, so that the pressing plate pressed by a worker can not limit the push block any more, at the moment, the push block only receives the elastic force action of the first spring, the push block resets under the elastic force action of the first spring, and the connected push rope between the two push blocks pushes the hands of the worker upwards away from the punching machine.

It should be noted that, in order to conform to the rotation direction of the joint of the hand, the chute is inclined upwards, and the hand of the worker can be bent towards himself in the pushing-away process.

Through the design, after the safety grating is utilized to detect that the hands of a worker extend to the punching area, the hands of the worker are forced to be pushed away from the punching machine while the punching machine is braked, so that the safety of the worker is ensured. In addition, the speed at which the hands of the worker extend to the punching machine can be reduced, so that the punching machine is stopped before the worker extends into the dangerous range of the punching machine, and the safety in using the punching machine is improved.

Preferably, the limiting block is provided with a telescopic rod, the telescopic rod is located on a movable path of the baffle plate when in an extending state, the side plate is provided with an infrared sensor, the telescopic rod is electrically controlled by the infrared sensor, the top of the extending end of the telescopic rod is provided with a spring III, the sleeve is fixedly connected with the three upper sides of the spring, the telescopic rod provides movement limiting for the sleeve, and the side wall of the sleeve is always contacted with the fixed end of the telescopic rod.

The working principle of the automatic feeding device is that in the feeding process of a worker, the pressing plate is pressed firstly, the baffle rotates to be separated from the detection range of the safety grating, the hands or arms of the worker continuously move forwards during feeding, the infrared sensor shields the infrared sensor, the telescopic rod is controlled to extend out, and the telescopic rod is positioned on the reset path of the baffle, at the moment, due to the blocking of the telescopic rod, even if the worker cannot press the pressing plate in place, the baffle cannot reset and trigger the safety grating; after the hands of workers are taken out, the hands do not shade the infrared sensor, the telescopic rod is retracted, the baffle can be reset, and the baffle can still trigger the safety grating to stop the punching machine when the unmanned pressing is realized.

It should be noted that, use spring three as the buffering of telescopic link, when avoiding the telescopic link ejecting, the baffle still is on the telescopic link, damages the telescopic link. The telescopic rod provides a movement limit for the sleeve, so that the movement of the sleeve is more stable on one hand; on the other hand, the sleeve is enabled to enable the force of the blocking baffle to act on the fixed end of the telescopic rod, and the fixed end below the telescopic rod is thicker, and the base is fixed at the bottom of the telescopic rod, so that the telescopic rod is more stable. The influence on the telescopic movement of the telescopic rod is reduced.

Through the design, workers do not need to press the pressing plate all the time in the feeding process, and the problems that the pressing plate cannot be pressed in place due to gradual straightening of arms in the pushing process of the material sheets are avoided, and therefore the safety grating is triggered to cause error stop and the like are avoided. Thereby ensuring the continuity of feeding work.

Preferably, the base is rotatably provided with two fixing blocks, two fixing blocks are L-shaped, two fixing blocks are provided with adsorption elements, and the base is provided with a convex part for limiting the rotation angle of the fixing blocks.

The adsorption element adopts magnet, including fastening magnet one, fastening magnet two, fastening magnet three on the fixed block, fastening magnet one.

After the die is replaced, the distance between the die and the limiting block is changed due to the size of the die and the size of the area on the workbench, and when the distance between the die and the limiting block is smaller than the safety distance required by the safety grating, the safety grating cannot stop the punching machine in time, so that the safety accident is caused, and the effect of the safety grating is further ensured.

The working principle is as follows: when the workbench is large enough and the base is placed on the workbench in a sufficient area, the fixing block is rotated, the first fastening magnet is fastened on the fixing block, the first fastening magnet limits the vertical movement of the base, the feeding table is propped against the die to limit the horizontal movement, the fixing block is blocked by the convex part, and the device is prevented from overturning when being pressed down by workers; when the workbench is too small or the die is too large, the fixing block is rotated when the workbench is not provided with a sufficient area for placing the base, the fixing block is tightly attached to the workbench by the second fastening magnet and the third fastening magnet, at the moment, the base moves in the horizontal direction limited by the second fastening magnet of the workbench, the third fastening magnet moves in the vertical direction limited by the third fastening magnet, the concave part on the base is clamped at the edge of the workbench, and the turnover of the generating device is prevented, so that the device is fixed at the edge of the workbench.

Through this design, solved because change different moulds for the workstation does not have sufficient space, leads to safety device to place unstable problem, thereby improves the adaptability of device to different moulds. When the fixing block prevents a worker from feeding, a force is applied to the device, and the device is pushed to be close to the die. The service condition of the safety grating cannot be met, so that the safety grating cannot stop the punching machine in time, safety accidents are caused, and the safety of punching operation is further guaranteed.

The magnetic attraction mode is adopted, so that the device is convenient to move when the die is replaced, and the die replacement is prevented from being influenced.

Preferably, the pushing block is provided with a pulley, the connecting rope is wound on the movable pulley, one end of the connecting rope is connected to the edge of the pressing plate, and the other end of the connecting rope is fixed on the limiting block. Through movable pulley structure, reduce because the compression pushes away the resistance that the device produced to make the increase push away the force that the device promoted workman's both hands, guarantee to push away the effect of workman's both hands. Due to the use of the traveling block structure, the platen needs to be rotated by a double stroke to compress the push-away device. In order to ensure the pushing distance of the pushing device, the connecting rope is connected to the edge of the pressing plate, and the rotating stroke is increased in a mode of increasing the rotating radius, so that the pushing device is compressed to the greatest extent, the distance of the pushing device pushing a human hand is increased, and the safety of the device is improved.

Preferably, a feeding table is fixedly arranged on one side, close to the lower die, of the limiting block, and the other end of the feeding table is propped against the side face of the lower die so that the distance between the limiting block and the lower die is equal to the safety distance required by the safety grating.

Since a worker needs to press the pressing plate when using the apparatus, the worker is inconvenienced to control the up-and-down movement of the web. With this design, the worker places the web on the feeding table and feeds the punch by manually pushing the web. Therefore, the material sheet can be ensured to be correctly positioned before entering the die, the material sheet is prevented from falling between the limiting block and the die after being blanked by the punching machine, the worker can reach a dangerous area to manually take out or remove the material sheet, the efficiency of the worker is improved, and the danger of the worker is reduced.

The safety distance S cannot be less than 100mm according to the safety grating installation standard. When the spacing between the limiting block and the die is smaller than 100mm, the safety grating can not stop the punching machine in time when the two hands are prevented from extending into the dangerous area.

The feeding table is propped between the limiting block and the die, so that a sufficient safety distance is ensured between the safety grating and the punching area, and the punching machine can be stopped in time by the safety grating. The error when preventing to install because the workman, perhaps forget remaining safe distance for the restriction piece is too close to the mould and leads to the unable punching machine of stopping in time of safety grating, takes place the incident, and in addition, balanced focus skew because induction system causes increases the stability in use of device.

Preferably, the maximum amount of retraction of the push-off device is equal to the length of travel of the baffle for blocking one end of the safety grating.

Through the design, after a worker completely compresses the pushing device, the baffle plate can be completely separated from the detection area of the safety grating, and further the braking of the safety grating on the punching machine is relieved. The pushing device is ensured to be available in each processing process, and the protection effect of the invention is further ensured. The pushing device is ensured to provide enough pushing force and distance in each stamping process, and the stamping machine can be started, so that the pushing device has enough pushing force after the safety grating is triggered, and can be used for rapidly pushing hands away from the stamping machine, so that the safety of using the device is ensured. If the pushing device is not sufficiently compressed, the pushing device cannot provide sufficient pushing force and distance even if the safety grating brakes the punching machine when the hand is extended to the punching area, so that the safety of the operator cannot be ensured.

Preferably, the support plate and the pressing plate are inclined downwards by 17 degrees when in a natural state. In order to ensure that the pressing plate can correctly detect whether the arm of a worker presses on the pressing plate, a method of setting the inclination angle of the pressing plate is adopted, so that the material sheet placed on the pressing plate can slide down. When sundries fall above the pressing plate, the sundries slide down along with the material sheets, so that the detection function of the pressing plate is not affected. A minimum tilt angle at which the web can be slid off is calculated. The punched sheet material is mostly stainless steel. The coefficient of static friction between the polyethylene plastic and the stainless steel is between about 0.2 and 0.3. The minimum inclination angle θ=arctan (0.3) ≡17° at which the platen can slide the web, so that the web dropped on the platen can slide off even when the platen inclination angle is 17 °. The angle is too large, so that the pressing plate is pressed down by a worker to act in a torsion mode, and the difficulty of pressing the pressing plate in the feeding process is increased; if the angle is too small, the sundries cannot slide down due to the gravity balance. Through this design, reduce because debris or material piece push down the clamp plate and make induction system erroneously discern it as workman's hand, and then erroneously release the braking to the punching machine, ensure after triggering the safety grating, push away the device and can accurately leave workman's hand push, improve the security of device.

It should be noted that, if the pressing plate or the material sheet is made of other materials, the friction force between the material sheet and the pressing plate is increased, and the inclination angle needs to be properly increased, so that the material sheet on the pressing plate is ensured, the height of the pressing plate is increased, and the worker is ensured to press the pressing plate in a convenient posture.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. the applicability of the safety device in manual continuous feeding is improved, and the safety of manual continuous feeding of workers is improved. By means of the mode that hands or arms of a worker are pushed away or the speed of the hands extending to the punching area is synchronously reduced when the punching machine is stopped, the induction device ensures that the hands of the worker cannot extend into the punching area before the punching is completely stopped.

2. Ensuring that the pushing-off device has sufficient force to push off the hands of the worker. Therefore, the labor-saving mechanism is utilized, and the force of a worker pressing the pressing plate is amplified by utilizing the principle of labor saving of the pulley, so that the pushing device has enough pushing force. The safety grating is guaranteed to send a signal to the process that the punching machine stops, the worker can timely leave a dangerous area, and the physical safety of the worker is guaranteed.

3. The pushing away device can be ensured to timely and accurately push away the hands of operators while the safety grating stops the punching machine. The punching machine is started by introducing specific actions in the continuous feeding process, the feeding actions of workers are limited, the arms of the workers are limited in specific areas, and therefore the pushing-away device can accurately push away the workers, and safety of the punching machine is improved.

Drawings

Fig. 1 is a schematic main body structure of a press;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a left side view of the press;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is an enlarged view of portion C of FIG. 4;

FIG. 6 is a cross-sectional view of the invention of FIG. 4;

FIG. 7 is an enlarged view of portion D of FIG. 6;

FIG. 8 is a state diagram of the pressing platen of FIG. 7;

fig. 9 is a state diagram of the trigger push-off device of fig. 7.

In the figure: 1. a frame; 2. a lower die; 3. a punch; 4. a foot switch; 5. a limiting block; 6. an induction device; 7. a base; 8. an infrared sensor; 9. a fixed block; 10. a feeding table; 11. a push-off device; 101. a main shaft; 102. a brake; 103. a work table; 201. an upper die; 601. a safety grating; 602. a pressing plate; 603. a baffle; 604. a second spring; 605. a pull rod; 801. a telescopic rod; 802. a third spring; 803. a sleeve; 901. a convex portion; 902. fastening a first magnet; 903. fastening a second magnet; 904. fastening a magnet III; 1101. a side plate; 1102. a chute; 1103. a pushing block; 1104. a push rope; 1105. a first spring; 1106. a connecting rope; 1107. a pulley; 1108. an electromagnet; 1109. iron sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 to 9, one embodiment of the present invention is shown:

the material of the material sheet is stainless steel, the size of the material sheet is 200mm multiplied by 300mm multiplied by 5mm, and the stamping area of the die is 200mm multiplied by 100mm. The punch stroke is 200mm.

Selecting according to actual production conditions: the feeding table 10 is provided with a length of 100mm according to the safety distance required by the safety grating 601, the length of the safety grating 601 is 200mm, the safety grating 601 is vertically arranged, the height difference between the safety grating 601 and the limiting block 5 is 8mm, and the distance between the two safety gratings 601 is 200mm; the platen 602 material is selected from polyethylene plastic, since the coefficient of static friction between polyethylene plastic and stainless steel is about 0.3. Setting the inclination angle θ=arctan (0.3) ≡17° of the platen 602 so that the foreign matter and the web falling on the platen 602 slowly slide down; the spring 1105 is selected to have an elastic coefficient of 156N/m, the maximum deformation amount is 80mm, and the minimum magnetic force of the electromagnet 1108 is at least 25N according to the weight of a single hand and a forearm of an adult female with a weight of 50kg to be about 2 kg; the pushing rope 1104 is made of aramid fiber materials, so that the deformation of the pushing rope 1104 when the pushing rope is pushed away is smaller, the pushing speed is higher, and the effect is better.

When the device is installed, the first fastening magnet 902 is fastened on the fixed block 9, the first fastening magnet 902 limits the vertical movement of the base 7, and the convex part 901 is blocked on the fixed block 9 to prevent the device from overturning when being pressed down by a worker.

Before using the punching machine, the hand is placed outside the safety area, the foot switch 4 is stepped on, whether the punching machine punch 3 falls down or not is observed, and whether the safety grating 601 fails or not is tested.

The material sheets are placed on the feeding table 10, two hands are naturally placed on the pressing plates 602 respectively, the pressing plates 602 rotate downwards under the action of gravity of the hands and the arms, the baffle plates 603 on the pressing plates 602 leave the detection area of the safety grating 601, the safety grating 601 releases the control of the brake 102, and the punch 3 can fall. In the downward rotation process of the pressing plate 602, the pressing plate 602 pulls the pushing block 1103 to move in the sliding groove 1102 through the connecting rope 1106, and the pushing block 1103 compresses the first spring 1105 to retract the pushing block 1103 towards the limiting block 5. The hands continue to move forward, the hands or arms of the worker block the infrared sensor 8, the infrared sensor 8 controls the telescopic rod 801 to extend, and the telescopic rod 801 is positioned on the reset path of the baffle 603. The tablet is pushed by both hands, part of tablet is put into lower mould 2 along feeding table 10, keeps both hands to place on clamp plate 602, steps on foot switch 4, foot switch 4 control punch 3 whereabouts, the last mould 201 of fixed on punch 3 and lower mould 2 compound die. And finishing the stamping forming of the material sheet. One hand of a worker lifts, the pressing plate 602 pressed by the hand is not pressed by the hand, the pressing plate 602 is reset under the action of the elastic force of the first spring 1105 and the second spring 604, the hand does not shade the infrared sensor 8, the telescopic rod 801 is retracted, the pressing plate 602 drives the baffle 603 to rotate into a detection area of the safety grating 601, the safety grating 601 controls the brake 102 to brake the main shaft 101, at the moment, in the resetting process of the pressing plate 602, the pushing blocks 1103 are synchronously reset, and the two hands of the worker are pushed upwards away from the punching machine by the connected pushing rope 1104 between the two pushing blocks 1103. The worker uses hands or tool clamps to finish stamping the workpiece, so that the situation that the worker clamps the hand due to sudden die closing caused by mistakenly stepping on the foot switch 4 in a material taking factory is avoided.

When a worker presses the pressing plate 602 or blocks the infrared sensor 8 by both hands in the punching process, but the hands extend to the punching machine to trigger the safety grating 601, the safety grating 601 controls the electromagnet 1108 to cut off the power, the electromagnet 1108 does not adsorb the pushing block 1103 any more, the pushing block 1103 is separated from the pull rod 605, the pressing plate 602 does not limit the pushing block 1103 to reset any more, the pushing block 1103 rapidly moves under the action of the elastic force of the first spring 1105, and the connected pushing rope 1104 between the two pushing blocks 1103 pushes both hands of the worker upwards away from the punching machine, so that the arms of the worker bend towards the worker, and safety of the worker is ensured. At this time, after the hands are lifted up and the infrared sensor 8 no longer detects the hands, the telescopic rod 801 is retracted, the baffle 603 is reset again, the safety grating 601 is continuously shielded, the spring II 604 drives the pressing plate to reset, and the pull rod 605 is contacted with the pushing block 1103 again.

When the last part of the web is completely located on the feeding table 10, the worker's both hands cannot put the web into the lower die 2 while pressing the pressing plate 602 due to the blocking of the restriction block 5. The worker puts the tablet into the mold, then puts the hand back onto the pressing plate 602, presses the foot switch 4, and the foot switch 4 controls the punch 3 to fall, and the upper mold 201 fixed on the punch 3 and the lower mold 2 are closed.

While the beneficial effects of the present invention have been illustrated in detail and example embodiments have been provided in this specification, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (8)

1. A high security hardware die stamping machine, comprising: the machine comprises a frame (1), wherein a motor is arranged in the frame (1), a main shaft (101) is arranged in the frame (1), a brake (102) is arranged on the main shaft (101), a transmission device is connected to the main shaft (101), the frame (1) is provided with a foot switch (4), a punch (3) is movably connected to the frame (1), an upper die (201) is fixedly arranged at the lower end of the punch (3), a workbench (103) is arranged on the frame (1), and a lower die (2) is fixedly arranged on the workbench (103);

the method is characterized in that: be equipped with base (7) on workstation (103), be equipped with fixed block (9) on base (7), be equipped with limiting block (5) on base (7), fixed mounting has sensing device (6) on limiting block (5), sensing device (6) control stopper (102) stop drift (3) whereabouts, sensing device (6) are including clamp plate (602) and safety grating (601), clamp plate (602) top is equipped with pushes away from device (11), clamp plate (602) restrict workman's arm in pushing away from the push away in the scope of pushing away from device (11) and for pushing away from device (11) energy storage, safety grating (601) detect behind the danger area that the people's hand is close to braking drift (3), start simultaneously pushing away from device (11) and push away from the punching machine with the staff on clamp plate (602).

2. The high-security hardware die stamping machine of claim 1, wherein: the induction device (6) comprises two safety gratings (601) vertically arranged on a limiting block (5), the bottom ends of the safety gratings (601) are higher than the top ends of the limiting block (5) by 15mm, two pressing plates (602) are rotatably arranged on the limiting block (5), two baffle plates (603) are arranged on the pressing plates (602), side plates (1101) are arranged on two sides of each pressing plate (602), four pull rods (605) are arranged on the side plates (1101), two springs (604) are sleeved on the pull rods (605) and are connected with the pressing plates (602) through connecting ropes (1106), the springs (604) are in a natural state, the baffle plates (603) are located between the two safety gratings (601), and the springs (604) are separated from a detection area between the two safety gratings (601) under a complete compression state.

3. The high-security hardware die stamping machine of claim 2, wherein: the push away device (11) is including setting up electro-magnet (1108) on pull rod (605), electro-magnet (1108) electric connection safety grating (601), two all be equipped with ejector pad (1103) on curb plate (1101), be equipped with on ejector pad (1103) with electro-magnet (1108) complex iron sheet (1109), two be connected with many pushing hands rope (1104) between ejector pad (1103), spout (1102) that are used for making ejector pad (1103) remove with the definite orbit are seted up to curb plate (1101), be equipped with spring one (1105) between ejector pad (1103) and spout (1102), spout (1102) are upwards inclined towards people's one end.

4. The high-security hardware die stamping machine of claim 2, wherein: be equipped with telescopic link (801) on restriction piece (5), telescopic link (801) are in when stretching out the state, are located the activity route of baffle (603), be equipped with infrared sensor (8) on curb plate (1101), infrared sensor (8) electric control telescopic link (801), be equipped with spring three (802) on the top of telescopic link (801) extension end, spring three (802) top fixedly connected with sleeve (803), telescopic link (801) provide the motion for sleeve (803) spacing, and sleeve (803) inner wall contact telescopic link (801) stiff end all the time.

5. The high-security hardware die stamping machine of claim 1, wherein: one side of the limiting block (5) close to the lower die (2) is fixedly provided with a feeding table (10), and the other end of the feeding table (10) is propped against the side surface of the lower die (2) so that the distance between the limiting block (5) and the lower die (2) is equal to the safety distance required by the safety grating (601).

6. A high security hardware die stamping press as defined in claim 3, wherein: the pull rod (605) is provided with a pulley (1107), the connecting rope (1106) is wound on the pulley (1107), one end of the connecting rope (1106) is connected to the edge of the pressing plate (602), and the other end of the connecting rope (1106) is fixed on the limiting block (5).

7. The high-security hardware die stamping machine as defined in claim 4, wherein: the maximum amount of shrinkage of the push-off device (11) is equal to the length of travel of the baffle (603) for blocking one end of the safety grating (601).

8. The high-security hardware die stamping machine of claim 2, wherein: the pressing plate (602) is inclined downwards by 17 degrees when in a natural state.