CN115945606B - Protective device of punch press - Google Patents
Protective device of punch press Download PDFInfo
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- CN115945606B CN115945606B CN202310238285.1A CN202310238285A CN115945606B CN 115945606 B CN115945606 B CN 115945606B CN 202310238285 A CN202310238285 A CN 202310238285A CN 115945606 B CN115945606 B CN 115945606B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention is applicable to the technical field of punching machines, and provides a protection device of a punching machine, which comprises: a housing having a plurality of cavities, the housing being provided with: the first cavity, the second cavity and the third cavity are sequentially arranged from bottom to top; the shell is provided with a plurality of through holes penetrating through the upper surface and the lower surface of the shell, and the through holes are slidably connected with the trigger rod; the third cavity is communicated with the first cavity through a vertical pipe, a sealing piece is arranged on the third cavity corresponding to the vertical pipe, the first cavity is communicated with the second cavity through a plurality of inner pipes, a sliding block is connected in the switching space in a sliding mode, and the sliding block is provided with a hollow structure. Therefore, the invention provides a prompt in the sense of the operator by touching the trigger rod by the limbs of the operator, and controls the connection and disconnection of different cavities by using different positions of the trigger rod to realize the inflation and the deflation of the air cylinder, thereby realizing the movement and the stop of the punching rod.
Description
Technical Field
The invention relates to the technical field of punching machines, in particular to a protective device of a punching machine.
Background
The pneumatic punching machine utilizes high-pressure gas to drive into the cylinder, and the rethread cylinder extrudes working punch downwards to accomplish the work of punching press, through the setting of pneumatic punching machine, reducible consumption of electric energy, and pneumatic punching machine has simple structure, the security is high, fault rate low grade characteristic, consequently, a large amount of mill can all adopt pneumatic punching machine to replace traditional motor punching machine, current punch press all can set up shift knob in the bottom, work through the cooperation of hand and foot, promote work efficiency, but the operative employee can not appear the mistake when the operation, make when the punching press, the hand is not in time retrieved, receive the injury. Various sensor devices can be additionally arranged in the prior art for detection protection, but the sensor is affected by a plurality of factors, such as power operation, long-term use under vibration environment, limited service life, sensitivity, detection range and the like. The sensor is not easy to find after being damaged, and can be generally found only when the sensor does not sense after an accident occurs, but the safety production accident is usually caused at the moment. Therefore, danger is easy to occur under the condition of power failure or sensor damage, safety accidents are generated, and casualties are caused.
The patent number is "CN202022929360.3" patent provides a pneumatic punching machine with prevent tong function, and it includes the punch press, the both sides gear engagement of punch press has the drive train, the side fixedly connected with protector of drive train, the drive train includes screw rod, first gear, second gear, drive belt, drive gear and screw sleeve, the fixed welding of second gear is on the side of drive gear, drive belt gear engagement is on the second gear, first gear engagement is at the inside one end of keeping away from the second gear of drive belt, screw sleeve fixed welding is in the inside center of first gear, the screw thread is pegged graft in screw sleeve's inside, protector includes guard rail board, draw-in groove and connection riser, the draw-in groove symmetry is seted up in the inside of connecting the riser. This scheme is through the setting of drive train and protector, can avoid personnel to stretch into the inside of punching machine with the hand by mistake when punching press work, has promoted the safety in utilization. However, the closing of the guardrail plate is realized by the movement of the punch, and when the hand is not taken out in time, the protection plate can obstruct the withdrawal of the arm, and the arm is extruded, so that larger injury is caused.
In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of Invention
Aiming at the defects, the invention aims to provide the protection device of the punch press, the movement of the punching rod is utilized to trigger the triggering rod, the limbs of an operator touch the triggering rod to provide a prompt in the sense of perception for the operator, and the different positions of the triggering rod are utilized to control the connection and disconnection of different cavities to realize the inflation and the deflation of the air cylinder, so that the movement and the stop of the punching rod are realized, the potential safety hazard caused by faults by adopting a sensor is avoided, and meanwhile, the movement of the sealing element is realized by utilizing the pressure in the air path, and no extra power sources such as electric power and the like are required to provide power.
In order to achieve the above object, the present invention provides a protection device for a punching machine, comprising: the shell is provided with a plurality of cavities, and the center of the shell is provided with a through hole which is used for fixedly connecting the stamping rod; the shell is provided with an air inlet and an air outlet;
the shell is provided with: the first cavity, the second cavity and the third cavity are sequentially arranged from bottom to top; the air inlet is communicated with the first cavity, and the air outlet is communicated with the third cavity; the first cavity pipeline is communicated with the third cavity, and the second cavity is respectively communicated with the first cavity and the third cavity through pipelines; the shell is provided with a plurality of through holes penetrating through the upper surface and the lower surface of the shell, the through holes are communicated with the first cavity and the third cavity, and the trigger rod is hermetically and slidably connected with the through holes;
the third cavity is communicated with the first cavity through a vertical pipe, a sealing piece is arranged corresponding to the vertical pipe, the sealing piece is in sliding connection with a block-shaped protrusion in the third cavity, the sealing piece can seal the vertical pipe, the sealing piece is a stepped shaft, the large end of the stepped shaft is in sliding connection with the block-shaped protrusion, the small end of the stepped shaft can be abutted against a pipe orifice of the vertical pipe, and the stepped shaft is elastically connected with the block-shaped protrusion; a blind hole is formed in the block-shaped bulge, the stepped shaft is connected with the blind hole in a sealing and sliding manner, and the second cavity pipeline is communicated with the bottom of the blind hole;
the first cavity and the second cavity are communicated through a plurality of inner pipes, a switching space is arranged in the first cavity corresponding to the inner pipes, a sliding block is connected in the switching space in a sliding mode, the inner pipes can be plugged in the sliding block moving process, the sliding block is sleeved with a trigger rod, the trigger rod can drive the sliding block to move, and the sliding block is provided with a hollow structure.
According to the protection device of the punch press, the lower end of the through hole is in clearance fit with the trigger rod, and the clearance fit tolerance is 0.01-0.05mm.
According to the protection device of the punch press, the trigger rod is in clearance fit with the upper end of the through hole, and the clearance fit tolerance is 0.01-0.03mm.
According to the protection device of the punch press, the trigger rod is provided with the positioning bosses which are arranged at intervals corresponding to the sliding blocks, and the distance between the positioning bosses is larger than the thickness of the sliding blocks.
According to the protection device of the punch press, the inner diameter of the blind hole is larger than the inner diameter of the riser, and the ratio of the inner diameter of the blind hole to the inner diameter of the riser is larger than 2.
According to the protective device of the punch press, the upper end of the trigger rod is provided with the flange, and the outer diameter of the flange is larger than the inner diameter of the through hole.
According to the protection device of the punch press, the lower end of the trigger rod is fixedly connected with the auxiliary plate.
According to the protection device of the punch press, the bottom of the auxiliary plate is provided with the roller.
The invention comprises the following steps: the shell is provided with a plurality of cavities, and the center of the shell is provided with a through hole which is used for fixedly connecting the stamping rod; the shell is provided with an air inlet and an air outlet; the shell is provided with: the first cavity, the second cavity and the third cavity are sequentially arranged from bottom to top; the air inlet is communicated with the first cavity, and the air outlet is communicated with the third cavity; the first cavity pipeline is communicated with the third cavity, and the second cavity is respectively communicated with the first cavity and the third cavity through pipelines; the shell is provided with a plurality of through holes penetrating through the upper surface and the lower surface of the shell, the through holes are communicated with the first cavity and the third cavity, and the trigger rod is hermetically and slidably connected with the through holes; the third cavity is communicated with the first cavity through a vertical pipe, a sealing piece is arranged corresponding to the vertical pipe, the sealing piece is in sliding connection with a block-shaped protrusion in the third cavity, the sealing piece can seal the vertical pipe, the sealing piece is a stepped shaft, the large end of the stepped shaft is in sliding connection with the block-shaped protrusion, the small end of the stepped shaft can be abutted against a pipe orifice of the vertical pipe, and the stepped shaft is elastically connected with the block-shaped protrusion; a blind hole is formed in the block-shaped bulge, the stepped shaft is connected with the blind hole in a sealing and sliding manner, and the second cavity pipeline is communicated with the bottom of the blind hole; the first cavity is communicated with the second cavity through a plurality of inner pipes, a switching space is arranged in the first cavity corresponding to the inner pipes, a sliding block is connected in the switching space in a sliding mode, the inner pipes can be plugged in the sliding block moving process, the sliding block is sleeved with the trigger rod, the trigger rod can drive the sliding block to move, and the sliding block is provided with a hollow structure; according to the invention, the triggering of the trigger rod is realized by utilizing the movement of the stamping rod, the triggering rod is touched by the limbs of an operator, the perception reminding is provided for the operator, the communication and the cutting-off of different cavities are controlled by utilizing different positions of the trigger rod, and the inflation and the air interruption of the air cylinder are realized, so that the deceleration movement and the stopping of the stamping rod are realized, and the potential safety hazard caused by the fact that faults are not easy to find when the sensor is used is avoided; the movement of the sealing element is realized by utilizing the pressure in the gas circuit, and no additional power sources such as electric power and the like are needed to provide power, so that the complexity of circuit arrangement is reduced; meanwhile, the gap between the trigger rod and the shell is utilized, so that the air path is subjected to specific leakage, the perception sensitivity of operators is improved, and the safety prompt effect is further enhanced.
Drawings
FIG. 1 is a schematic view of a three-dimensional mounting structure of the present invention; FIG. 2 is a schematic perspective view of the present invention; FIG. 3 is a schematic perspective sectional structure of the present invention; FIG. 4 is another perspective cross-sectional schematic view of the present invention; FIG. 5 is a schematic view of a third perspective cross-sectional structure of the present invention; FIG. 6 is a schematic perspective view of the trigger lever of the present invention; FIG. 7 is a schematic view of the structure of the slider of the present invention; FIG. 8 is a schematic view of the cross-sectional structure of the first cavity of the housing of the present invention; FIG. 9 is a schematic cross-sectional view of the second chamber of the housing of the present invention; FIG. 10 is a schematic cross-sectional view of a third chamber of the housing of the present invention; FIG. 11 is a schematic structural view of one embodiment of the seal of the present invention; in the figure, 1-first cavity, 11-riser, 12-inner tube, 13-switching space, 2-second cavity, 21-block-shaped protrusion, 211-first pipeline, 212-second pipeline, 213-blind hole, 3-third cavity, 4-trigger rod, 41-positioning boss, 42-auxiliary plate, 5-slider, 51-hollow structure, 6-sealing piece, 100-shell, 101-through hole, 102-air outlet, 103-air inlet and 104-through hole.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 10, the present invention provides a protection device for a punching machine. The protection device of the punch press comprises: the shell 100 with a plurality of cavities, wherein a through hole 101 is arranged in the center of the shell 100, and the through hole 101 is used for fixedly connecting a punching rod; the shell 100 is provided with an air inlet 103 and an air outlet 102; the housing 100 is fixed to the pressing bar and moves with the movement of the pressing bar. An air inlet above the punching machine cylinder is connected with an air outlet 102 on the shell 100 in a pipeline manner, and an air inlet 103 on the shell 100 is connected with an external air path. The pipeline between cylinder and shell 100 can be fixed on the stand of punch press through the strapping after leaving certain surplus, guarantees that shell 100 can freely remove with the punching press pole, avoids the pipeline overlength to cause the potential safety hazard simultaneously, can also set up the spiral trachea, realizes tracheal automatic extension and accomodates.
The housing 100 is provided with: the first cavity 1, the second cavity 2 and the third cavity 3 are sequentially arranged from bottom to top; the air inlet 103 is communicated with the first cavity 1, and the air outlet 102 is communicated with the third cavity 3; the first cavity 1 is in pipeline communication with the third cavity 3, and the second cavity 2 is in pipeline communication with the first cavity 1 and the third cavity 3 respectively; the shell 100 is provided with a plurality of through holes 104 penetrating through the upper surface and the lower surface of the shell 100, the through holes 104 are slidably connected with the trigger rod 4, the through holes 104 are communicated with the first cavity 1 and the third cavity 3, the trigger rod 4 is hermetically and slidably connected with the through holes 104, the trigger rod 4 plugs the through holes 104, and air leakage is prevented from being caused by the through holes 104 communicated between the first cavity 1 and the third cavity 3.
The third cavity 3 is communicated with the first cavity 1 through a vertical pipe 11, the third cavity 3 is provided with a sealing piece 6 corresponding to the vertical pipe 11, the sealing piece 6 is slidably connected with a block-shaped protrusion 21 in the third cavity 3, and in a normal state, a gap is reserved between the sealing piece 6 and an outlet of the vertical pipe 11, so that the first cavity 1 is communicated with the third cavity 3. The seal 6 is capable of sealing the riser 11 and when a force is applied to one side of the seal 6, the seal 6 can be blocked from the outlet of the riser 11, so that the first chamber 1 is isolated from the third chamber 3. The sealing piece 6 is a stepped shaft, the large end of the stepped shaft is connected with the block-shaped protrusion 21 in a sliding manner, the small end of the stepped shaft can be abutted against the outlet of the vertical pipe 11, and the stepped shaft is elastically connected with the block-shaped protrusion 21; the block-shaped bulge 21 is internally provided with a blind hole 213 corresponding to the sealing piece 6, the stepped shaft is connected with the blind hole 213 in a sliding manner, and the tail end of the blind hole 213 is communicated with the second cavity 2.
The first cavity 1 is communicated with the second cavity 2 through a plurality of inner pipes 12, the first cavity 1 corresponds the inner pipes 12 are provided with a switching space 13, a sliding block 5 is slidably connected in the switching space 13, the inner pipes 12 can be blocked in the moving process of the sliding block 5, the sliding block 5 is sleeved with the trigger rod 4, the trigger rod 4 can drive the sliding block 5 to move, the sliding block 5 is provided with a hollow structure 51, the space above and below the sliding block 5 can be communicated, and the gas pressure received by the upper surface and the lower surface of the sliding block 5 in the first cavity 1 is the same.
The punch generally works in the following manner: firstly, an air inlet above the air cylinder is inflated, the stamping rod descends, a die on the stamping rod is utilized to stamp or extrude a workpiece on the workbench, then the air cylinder reversely inflates, the stamping rod ascends, the stamped workpiece is taken down, a new workpiece to be stamped is placed, and the operation is repeated to stamp. The ram speed of the cylinder is related to the speed of the charge, and conventional operation is typically controlled by a speed valve on the cylinder intake.
The guard is mounted to the ram and the ram can be threaded with nuts on top and bottom of the housing 100 to secure the housing 100 to the ram and over the mold. The housing 100 is added to the line of the air intake above the cylinder. And then pressure gas is applied to a pipeline of an air inlet above the cylinder. The pressure in the gas circuit in the workshop is generally 0.8mpa, and the air pressure and the air quantity are very sufficient. When gas enters the first cavity 1 through the gas inlet 103 on the housing 100, the gas enters the third cavity 3 through the vertical pipe 11, and enters the upper cavity of the cylinder through the gas outlet 102 on the housing 100, and the punching rod descends. At this time, the slider 5 seals the inner tube 12, and the second chamber 2 is in a closed state.
The trigger lever 4 evenly is located around the punching press pole, the terminal of trigger lever 4 is slightly below the terminal mould surface of punching press pole according to actual need, often adopts the gesture that the arm was stretched before the slope to operate when operating personnel took the work piece, when operating personnel's limbs did not move out the punching press position, the operating personnel's below trigger lever 4 limbs often were higher than the position of the palm below the punching press pole, when operating personnel's such as trigger lever 4 contact arm's limbs, the punching press pole did not contact the palm, the arm was in the unsettled state simultaneously, there was the space of downshifting yet, trigger lever 4 can not hurt the limbs pressure.
When the trigger rod 4 is subjected to the resistance of limbs, the sliding block 5 is moved upwards, the sliding block 5 opens the inner pipe 12 and is communicated with the first cavity 1 and the second cavity 2, the inner diameter of the inner pipe 12 is larger than the inner diameter of the air inlet 103, so that gas enters the second cavity 2, meanwhile, the second cavity 2 is communicated with the blind holes 213 in the block-shaped protrusions 21 through the first pipelines 211 and the second pipelines 212 which are perpendicular to each other, and the pressure in the blind holes 213 is increased and is the same as the pressure in the first cavity 1. At this time, the pressure rod is still in a descending state, the volumes of the third cavity 3 and the upper cavity of the air cylinder are gradually increased, the pressure in the third cavity 3 is smaller than the pressure in the first cavity 1, and meanwhile, the diameter of the large end of the stepped shaft is larger than that of the small end of the stepped shaft, so that the pressure in the blind hole 213 pushes out the sealing piece 6 and gradually seals the vertical pipe 11, the air inflow of the air cylinder is gradually reduced until no air is introduced, the descending speed of the pressure rod is reduced or the pressure rod stops descending. After the operator observes the abnormal phenomenon, the operator takes out the hand, so that the safety accident is avoided.
Then, the direction of inflation to the cylinder is switched by the foot switch, so that the air inlet 103 of the housing 100 is communicated with the atmosphere, and the air inlet below the cylinder is filled with pressure gas. The pressure in the first cavity 1 becomes atmospheric pressure, and sealing member 6 slides into blind hole 213 under the atmospheric pressure effect in spring and the third cavity 3 for riser 11 intercommunication first cavity 1 and third cavity 3, with the pressure gas discharge of cylinder top cylinder body, make the ram rod can shift up, and the ram rod drives shell 100 and rises, when rising to the assigned position, the cylinder outer wall pushes down trigger lever 4, makes slider 5 with inner tube 12 shutoff reset. And then stamping again.
Referring to fig. 4, 6, and 8 to 10, further, for convenience of description, a portion of the through hole 104 located between the first cavity 1 and the third cavity 3 is referred to as a middle section of the through hole 104, a connection portion of the through hole 104 and the first cavity 1 is referred to as a lower end of the through hole 104, a connection portion of the through hole 104 and the third cavity 3 is referred to as an upper end of the through hole 104, the middle section of the through hole 104 is in sealed sliding connection with the trigger rod 4, the lower end of the through hole 104 is in clearance fit with the trigger rod 4, and a clearance fit tolerance is 0.01-0.05mm, so that gas can leak through a clearance by a certain small amount, and at the same time, a sound of the split is emitted, the gas leak can be directly blown to the skin of an operator, so that the operator can perform corresponding treatment through perception. Especially when using in summer, the weather is hot, and operating personnel is tired more easily, increases operating personnel's perceptibility through blowing, and the protection reminds the effect better. The mode can cause loss of a small amount of air quantity, but the air quantity can be ignored compared with the situation that a large amount of air quantity is supplied to workshops and the like, meanwhile, the lost air quantity only appears in the pressing down process of the stamping rod, and compared with the mode that the sensor needs to work in the whole process and further needs to provide power by using extra electric power, the mode is low in use cost. Meanwhile, the small amount of leaked gas plays a role in warning the reminding operator. In the prior art, various measures are generally taken to avoid the condition of air leakage, and the safety prompt effect is realized through a specific small amount of air leakage.
Further, the upper end of the through hole 104 is in clearance fit with the trigger rod 4, the clearance fit tolerance is 0.01-0.03mm, the clearance tolerance between the upper end of the through hole 104 and the trigger rod 4 is slightly smaller than the clearance tolerance between the lower end of the through hole 104 and the trigger rod 4, the clearance between the upper end of the through hole 104 and the trigger rod 4 is used for assisting in depressurization, and the clearance between the lower end of the through hole 104 and the trigger rod 4 is used for reminding an operator. When the second cavity 2 is pressurized, the triggering rod 4 moves the sliding block 5 downwards and plugs the inner pipe 12 due to misoperation, so that the sealing piece 6 always pressurizes the plugging vertical pipe 11, the third cavity 3 is isolated from the first cavity 1, and the stamping rod cannot move upwards. Through the clearance fit between the upper end of the through hole 104 and the trigger rod 4, the gas in the third cavity 3 is gradually released outwards, and the stamping rod can move upwards.
Referring to fig. 5 and 6, further, the trigger lever 4 is provided with positioning bosses 41 arranged at intervals corresponding to the sliding block 5, and the interval between the positioning bosses 41 is larger than the thickness of the sliding block 5. In operational use, if the trigger lever 4 touches the limb of the operator, the operator immediately senses the danger and takes the limb out, the trigger lever 4 moves up a certain distance but the slide 5 is not moved yet, and the punching can be continued. When the operator still does not sense danger, the trigger rod 4 continues to move upwards, the sliding block 5 is moved upwards, the first cavity 1 and the second cavity 2 are communicated, the vertical pipe 11 is gradually plugged, and the stamping rod is slowed down until the stamping rod stops moving downwards. The trigger lever 4 moves up a certain distance and then abuts against the bottom of the switching space 13, the trigger lever 4 moves along with the housing 100 and is pressed on the arm of an operator, the operator is forced to abut against and is reminded again, and the arm is taken out. The trigger lever 4 alerts the operator using three modes: through the gas blowing arm of specific leakage, reduce the depression bar decline speed and direct butt arm, guarantee that operating personnel has sufficient time to react, reduced the coefficient of safety risk, guarantee operating personnel's safety in utilization.
Further, the inner diameter of the blind hole 213 is larger than the inner diameter of the riser 11, and the large end of the stepped shaft is slidably connected to the block-shaped protrusion 21. After the inner pipe 12 is opened by the sliding block 5, the pressure between the first cavity 1 and the second cavity 2 is the same as the pressure in the gas circuit pipeline of the factory. When the stamping rod is in a descending state, the pressure in the third cavity 3 is smaller than the pressure in the first cavity 1, the pressure at the air outlet of the vertical pipe 11 is smaller than the pressure in the first cavity 1, meanwhile, as the sectional area of the air outlet of the vertical pipe 11 is smaller than the sectional area of the blind hole 213, according to a pressure formula f=ps, the stress at the two ends of the stepped shaft is different, the stress at the large end of the stepped shaft is larger than the stress at the small end of the stepped shaft, and the stepped shaft slides outwards until the vertical pipe 11 is blocked. Preferably, the ratio of the inner diameter of the blind bore 213 to the inner diameter of the riser 11 is greater than 2, so that the pressure difference across the stepped shaft is greater and the movement of the stepped shaft is more rapid and reliable. With reference to fig. 4 and 11, the small end of the stepped shaft is preferably in a tapered structure, the tapered structure can reduce the moving resistance of the stepped shaft, and meanwhile, a rubber elastic layer is attached to the surface of the tapered structure, so that the sealing effect is better after the riser 11 is blocked by the small end of the stepped shaft. The stepped shaft is used to reduce the rate at which the first chamber 1 inflates the third chamber 3 and the cylinder.
Further, a flange is arranged at the upper end of the trigger rod 4, the outer diameter of the flange is larger than the inner diameter of the through hole 104, and the flange can prevent the trigger rod 4 from falling off from the through hole 104.
Further, trigger lever 4 below fixed connection auxiliary plate 42, auxiliary plate 42 can increase the trigger area of trigger lever 4, and the security is better, can set up a plurality of trigger levers 4 on an auxiliary plate 42, prevents to cause the slope that trigger lever 4 caused because the atress is inhomogeneous, influences the life of trigger lever 4.
Further, the bottom of the auxiliary plate 42 is provided with rollers, which can reduce the moving resistance of the auxiliary plate 42 when contacting with the limb, so that the operator can move out the limb better.
When the punch is used to punch a workpiece, the guard is mounted to the punch stem, and the housing 100 can be screwed to the punch stem with nuts at the upper and lower sides of the housing 100 and above the punch die. The housing 100 is added to the line of the intake port above the cylinder. And then pressure gas is applied to a pipeline of an air inlet above the air cylinder, the pressure in the air circuit in the workshop is generally 0.8mpa, and the air pressure and the air quantity are sufficient. When gas enters the first cavity 1 through the gas inlet 103 on the housing 100, the gas enters the third cavity 3 through the vertical pipe 11, and enters the upper cavity of the cylinder through the gas outlet 102 on the housing 100, and the punching rod descends. At this time, the slider 5 seals the inner tube 12, and the second chamber 2 is in a closed state.
When an operator takes a workpiece, the operator always adopts a posture that the arm is inclined and extends forward to operate, so that the limb of the operator below the trigger lever 4 is always higher than the position of the palm below the punching lever, and when the limb of the operator does not move out of the punching position, the trigger lever 4 contacts the limb of the operator such as the arm, and the punching lever does not contact the palm at the moment.
When the trigger lever 4 is subjected to the resistance of the limb, it moves up relative to the housing 100, and three conditions occur:
1. if the operator senses a danger, the operator rapidly moves the arm out, and the trigger lever 4 is moved up by a distance that the slider 5 is not moved, at which time the pressing can be continued, and the trigger lever 4 stops moving relative to the housing 100. After stamping, the air cylinder is reversely inflated, the stamping rod moves upwards, and the cylinder body above the air cylinder is communicated with the outside atmosphere through the third cavity 3 and the first cavity 1, so that exhaust is realized;
2. the operator fails to move the limb out, the trigger rod 4 continues to move upwards, but does not contact the bottom of the switching space 13, the sliding block 5 moves upwards under the action of the positioning boss 41, the sliding block 5 opens the inner pipe 12 and is communicated with the first cavity 1 and the second cavity 2, gas enters the second cavity 2, meanwhile, the second cavity 2 and the blind hole 213 in the block-shaped bulge 21 are communicated with the second pipeline 212 through the first pipeline 211 which is mutually perpendicular, so that the pressure in the blind hole 213 is gradually increased and is the same as the pressure in the first cavity 1, the stamping rod is in a descending state at the moment, the volumes of the third cavity 3 and the upper side cavity of the cylinder are gradually increased, the pressure in the third cavity 3 is smaller than the pressure in the first cavity 1, and meanwhile, the stressed area and the stressed pressure of the large end of the sealing piece 6 are larger than the stressed area and the pressure of the small end of the sealing piece because the cross section area of the air outlet of the vertical pipe 11 is smaller than the cross section of the blind hole 213. The sealing member 6 moves towards the outlet of the vertical pipe 11 and gradually plugs the vertical pipe 11, so that the cylinder body inflation speed above the cylinder is reduced until the pressing rod stops moving. After the operators observe the abnormal condition, the limbs are moved out, the air cylinder is reversely inflated by utilizing the foot switch, the inflation pipeline above the air cylinder is communicated with the atmosphere, the air pressure drop in the first cavity 1 and the second cavity 2 is the atmospheric pressure, the sealing piece 6 reversely moves under the action of the spring, the third cavity 3 is communicated with the first cavity 1, and the punching rod moves upwards. When the punching rod rises to the highest position, the trigger rod 4 is pressed downwards to reset, the sliding block 5 moves downwards, the inner pipe 12 is plugged again, and the sealing of the second cavity 2 is realized. Preparing for re-stamping;
3. the trigger lever 4 moves up a certain distance and then abuts against the bottom of the switching space 13, the trigger lever 4 moves along with the housing 100, the bottom of the trigger lever 4 is pressed down on the arm of the operator, and the operator is forced to abut against. Because the arm of the operator is generally suspended, the lower part of the arm is a certain distance away from the workbench, the arm is not injured by the trigger rod 4, and the operator is reminded to take out the arm again by the downward movement of the trigger rod 4. And then the pedal switch is utilized to reversely charge the air cylinder.
In summary, the present invention includes: the shell is provided with a plurality of cavities, and the center of the shell is provided with a through hole which is used for fixedly connecting the stamping rod; the shell is provided with an air inlet and an air outlet; the shell is provided with: the first cavity, the second cavity and the third cavity are sequentially arranged from bottom to top; the air inlet is communicated with the first cavity, and the air outlet is communicated with the third cavity; the first cavity pipeline is communicated with the third cavity, and the second cavity is respectively communicated with the first cavity and the third cavity through pipelines; the shell is provided with a plurality of through holes penetrating through the upper surface and the lower surface of the shell, the through holes are communicated with the first cavity and the third cavity, and the trigger rod is hermetically and slidably connected with the through holes; the third cavity is communicated with the first cavity through a vertical pipe, a sealing piece is arranged corresponding to the vertical pipe, the sealing piece is in sliding connection with a block-shaped protrusion in the third cavity, the sealing piece can seal the vertical pipe, the sealing piece is a stepped shaft, the large end of the stepped shaft is in sliding connection with the block-shaped protrusion, the small end of the stepped shaft can be abutted against a pipe orifice of the vertical pipe, and the stepped shaft is elastically connected with the block-shaped protrusion; a blind hole is formed in the block-shaped bulge, the stepped shaft is connected with the blind hole in a sealing and sliding manner, and the second cavity pipeline is communicated with the bottom of the blind hole; the first cavity is communicated with the second cavity through a plurality of inner pipes, a switching space is arranged in the first cavity corresponding to the inner pipes, a sliding block is connected in the switching space in a sliding mode, the inner pipes can be plugged in the sliding block moving process, the sliding block is sleeved with the trigger rod, the trigger rod can drive the sliding block to move, and the sliding block is provided with a hollow structure; according to the invention, the triggering of the trigger rod is realized by utilizing the movement of the stamping rod, the triggering rod is touched by the limbs of an operator, the perception reminding is provided for the operator, the communication and the cutting-off of different cavities are controlled by utilizing different positions of the trigger rod, and the inflation and the air interruption of the air cylinder are realized, so that the deceleration movement and the stopping of the stamping rod are realized, and the potential safety hazard caused by the fact that faults are not easy to find when the sensor is used is avoided; the movement of the sealing element is realized by utilizing the pressure in the gas circuit, and no additional power sources such as electric power and the like are needed to provide power, so that the complexity of circuit arrangement is reduced; meanwhile, the gap between the trigger rod and the shell is utilized, so that the air path is subjected to specific leakage, the perception sensitivity of operators is improved, and the safety prompt effect is further enhanced.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must be provided with a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A protective device for a punching machine, comprising: the shell is provided with a plurality of cavities, and the center of the shell is provided with a through hole which is used for fixedly connecting the stamping rod; the shell is provided with an air inlet and an air outlet;
the shell is provided with: the first cavity, the second cavity and the third cavity are sequentially arranged from bottom to top; the air inlet is communicated with the first cavity, and the air outlet is communicated with the third cavity; the first cavity pipeline is communicated with the third cavity, and the second cavity is respectively communicated with the first cavity and the third cavity through pipelines; the shell is provided with a plurality of through holes penetrating through the upper surface and the lower surface of the shell, the through holes are communicated with the first cavity and the third cavity, and the trigger rod is hermetically and slidably connected with the through holes;
the third cavity is communicated with the first cavity through a vertical pipe, a sealing piece is arranged corresponding to the vertical pipe, the sealing piece is in sliding connection with a block-shaped protrusion in the third cavity, the sealing piece can seal the vertical pipe, the sealing piece is a stepped shaft, the large end of the stepped shaft is in sliding connection with the block-shaped protrusion, the small end of the stepped shaft can be abutted against a pipe orifice of the vertical pipe, and the stepped shaft is elastically connected with the block-shaped protrusion; a blind hole is formed in the block-shaped bulge, the stepped shaft is connected with the blind hole in a sealing and sliding manner, and the second cavity pipeline is communicated with the bottom of the blind hole;
the first cavity is communicated with the second cavity through a plurality of inner pipes, a switching space is arranged in the first cavity corresponding to the inner pipes, a sliding block is connected in the switching space in a sliding mode, the inner pipes can be plugged in the sliding block moving process, the sliding block is sleeved with the trigger rod, the trigger rod can drive the sliding block to move, and the sliding block is provided with a hollow structure; an air inlet above the punching machine cylinder is connected with an air outlet pipeline on the shell, and the air inlet on the shell is connected with an external air circuit.
2. The protective device of the punch press according to claim 1, wherein the lower end of the through hole is in clearance fit with the trigger rod, and the clearance fit tolerance is 0.01-0.05mm.
3. The protective device of the punch press according to claim 2, wherein the trigger rod is in clearance fit with the upper end of the through hole, and the clearance fit tolerance is 0.01-0.03mm.
4. A protection device for a punching machine according to any one of claims 1-3, characterized in that the triggering lever is provided with positioning bosses arranged at intervals in correspondence with the slide blocks, the spacing between the positioning bosses being greater than the thickness of the slide blocks.
5. The protective device of a punch press according to claim 4, wherein the inner diameter of the blind hole is larger than the inner diameter of the riser, and the ratio of the inner diameter of the blind hole to the inner diameter of the riser is larger than 2.
6. The protector for a punch press of claim 5, wherein the upper end of the trigger lever is provided with a flange, and the flange has an outer diameter larger than an inner diameter of the through hole.
7. The protector for punch press according to claim 5, wherein the lower end of the trigger lever is fixedly connected to the auxiliary plate.
8. The apparatus according to claim 7, wherein the auxiliary plate has rollers at the bottom thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310238285.1A CN115945606B (en) | 2023-03-14 | 2023-03-14 | Protective device of punch press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310238285.1A CN115945606B (en) | 2023-03-14 | 2023-03-14 | Protective device of punch press |
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| Publication Number | Publication Date |
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| CN115945606A CN115945606A (en) | 2023-04-11 |
| CN115945606B true CN115945606B (en) | 2023-05-23 |
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| CN202310238285.1A Active CN115945606B (en) | 2023-03-14 | 2023-03-14 | Protective device of punch press |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1559087A (en) * | 1975-12-01 | 1980-01-16 | Norton Tool Co Ltd | Machine tool guards |
| CN202845644U (en) * | 2012-08-28 | 2013-04-03 | 昆山圣丰电子科技有限公司 | Pneumatic punching machine |
| CN202779544U (en) * | 2012-09-11 | 2013-03-13 | 新乡市正元科技电源材料有限公司 | Die protection device for composite die during automatic punching |
| AT518639B1 (en) * | 2016-07-26 | 2017-12-15 | Trumpf Maschinen Austria Gmbh & Co Kg | Workpiece processing machine and method for operating the workpiece processing machine |
| CN210208397U (en) * | 2019-06-03 | 2020-03-31 | 山东安贝智能物流设备有限公司 | Improved 160-ton punching machine |
| CN112007987B (en) * | 2020-07-21 | 2021-06-18 | 浙江金澳兰机床有限公司 | Punch press with mistaken touch prevention device and using method thereof |
| CN214348911U (en) * | 2020-12-10 | 2021-10-08 | 湖北闵发科技有限公司 | Pneumatic punch press with prevent tong function |
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