CN113857361A

CN113857361A - Numerical control stamping die

Info

Publication number: CN113857361A
Application number: CN202111032119.3A
Authority: CN
Inventors: 杨西岐; 张秀平
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2021-12-31

Abstract

The invention belongs to the field of die manufacturing, and particularly relates to a numerical control stamping die which comprises a multi-stage hydraulic cylinder, a gas storage bag, an upper die and a lower die, wherein the top of the gas storage bag is embedded into the top of a numerical control punch press, the multi-stage hydraulic cylinder is fixedly connected to the upper surface of the gas storage bag and penetrates through the gas storage bag, two round holes are formed in the top of the gas storage bag, an atomizing nozzle is arranged in each round hole and connected with a water path of the numerical control punch press, the side wall of the gas storage bag is made of flexible rubber, eight one-way air valves are arranged on the side wall of the gas storage bag, the bottom of the gas storage bag is fixedly connected with an upper die holder, the upper die is fixedly connected with a piston rod of the multi-stage hydraulic cylinder, a jet pipeline is formed in the bottom of the gas storage bag and penetrates through the bottom of the gas storage bag and the upper die. Through mixing the gas-liquid, improve the mixture velocity of flow through the pressure boost simultaneously, reached the effect that increases the cooling effect.

Description

Numerical control stamping die

Technical Field

The invention belongs to the field of die manufacturing, and particularly relates to a numerical control stamping die.

Background

The numerical control punch can be used for processing various metal sheet parts, and can automatically finish various complex hole patterns and shallow drawing forming processing at one time (automatically process holes with different shapes and different hole distances according to requirements), can also use a small punch die to punch large round holes, square holes, waist-shaped holes and curve outlines with various shapes in a stepping mode, and can also carry out special process processing, such as shutters, shallow drawing, counter bores, flanging holes, reinforcing ribs, coining and the like). Through simple mould combination, for traditional punching press, saved a large amount of mould expenses, can use low-cost and short cycle processing small batch, diversified product, have great process range and throughput to in time adapt to the change of market with the product. The numerical control turret punch press die is also called a numerical control punch press die, a numerical control punching die and a numerical control punching die, is an important component of a numerical control punch press, and generally comprises an upper die, a lower die and a die holder.

In the use process of the numerical control punch press, due to high-frequency contact friction between the punch and a workpiece during punching, the punch position is usually at a higher temperature, so that on one hand, fine particles of a plate can be bonded on the surface of the punch to reduce the punching quality, on the other hand, the sharpening frequency of the punch is obviously increased, and the service life of the punch is reduced.

The existing punching die of the punching machine does not have a punching head cooling device, an external fan or water spray cooling is adopted, the cooling effect is general, the heating condition of the punching head can not be effectively solved, the processing quality is reduced to a certain extent, and the service life of the punching head is shortened.

Disclosure of Invention

The invention aims to provide a numerical control stamping die, and particularly aims to solve the problems that the existing stamping die of a punch press is not provided with a punch cooling device, an external fan or water spray cooling is adopted, the cooling effect is general, the problem of punch heating cannot be effectively solved, the processing quality is reduced to a certain extent, and the service life of the punch is shortened.

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

a numerical control stamping die comprises a multi-stage hydraulic cylinder, a gas storage bag, an upper die and a lower die, wherein the top of the gas storage bag is embedded into the top of a numerical control punch press, the upper surface of the gas storage bag is fixedly connected with the multi-stage hydraulic cylinder, the multi-stage hydraulic cylinder can ensure a large stroke and save space and improve the space utilization rate, the multi-stage hydraulic cylinder penetrates through the gas storage bag, two round holes are formed in the top of the gas storage bag, an atomizing nozzle is respectively arranged in each round hole and connected with a water channel of the numerical control punch press, water mist can be sprayed into the gas storage bag in a working state, the side wall of the gas storage bag is made of flexible rubber materials, eight one-way air valves are arranged on the side wall of the gas storage bag, the two one-way air valves are distributed in groups in four directions, namely, the front and the back, the left and the right, the bottom of the gas storage bag is fixedly connected with an upper die base, the upper die is fixedly connected with a piston rod of the multi-stage hydraulic cylinder, the injection pipeline has been seted up to gas storage bag bottom, the injection pipeline runs through gas storage bag bottom and last mould, when multistage pneumatic cylinder extension, the gas storage bag lateral wall is stretched, the inner space increases, through one-way pneumatic valve with inside the air suction gas storage bag, make air and water smoke mix, when multistage pneumatic cylinder shrink, gas storage bag inner space reduces, the mixture of the air of its inside storage and water smoke is compressed the pressure boost, spout by the injection pipeline, cool off the part below the mould, through mixing gas-liquid, improve the mixture velocity of flow simultaneously through the pressure boost, the effect of increase cooling effect has been reached.

Preferably, the injection pipeline is of a conical structure, the injection pipeline is bent in the upper die and points to the direction of the punch, a gas-liquid mixture sprayed out of the gas storage bag is directly sprayed on the surface of the punch to quickly take away heat, meanwhile, water mist is sprayed on the surface of the punch to form liquid water drops, one part of the water drops continuously exchanges heat, evaporates and vaporizes, and the other part of the water drops slides downwards along with the surface of the punch to play a certain lubricating role.

Preferably, the upper die comprises an upper die base, a buffer plate and a punch, wherein a cylindrical hole is formed in the center of the bottom of the upper die base, the punch is fixedly connected with the top of the cylindrical hole through a spring and is in sliding connection with the side wall of the cylindrical hole, the punch penetrates through the center of the buffer plate, four corners of the bottom of the upper die base are provided with four cylindrical deep holes, the buffer plate is fixedly connected with the top of the cylindrical deep hole through a spring guide pillar, the spring guide pillar is in sliding connection with the side wall of the cylindrical deep hole, when the upper die moves downwards, the punch contacts the workpiece part firstly, the spring at the top of the punch plays a role firstly for buffering, when the spring is extruded to a certain degree, the buffer plate contacts the surface of the workpiece, the buffer spring sleeved on the spring guide pillar works under stress, secondary buffering is realized, and after the upper die moves to a certain position, the spring at the top of the punch is increased in stress for third buffering, through the cooperation of two springs, the three-level buffering effect on the punching process is realized.

Preferably, four diversion holes are formed in the buffer plate close to the center, the diversion holes are distributed in a cross shape, the upper half part of each diversion hole is in a funnel shape, the lower half part of each diversion hole is an inclined cylindrical directional punch, the outlet of each diversion hole is located in the inner wall of a through hole of each punch, when water mist is sprayed out from a spraying pipeline and gathered into a liquid state, one part of the water mist flows down along the surface of each punch, one part of the water mist can be accumulated on the upper surface of the buffer plate, the water accumulated on the upper surface of the buffer plate can continuously cool the space between the buffer plate and an upper die, one part of the water mist enters the diversion holes, the water mist can lubricate relative sliding between the punches and the buffer plate, and on the other hand, water drops falling from the punches on the surface of a workpiece, the surface of the workpiece can be cooled, and the utilization rate of the water is improved to the maximum.

Preferably, the lower die comprises a lower die base, a material pushing block and an overload protection column, a cylindrical hole is formed in the middle of the top of the lower die base, the diameter of the upper part of the cylindrical hole is approximately equal to that of the punch, the diameter of the lower part of the cylindrical hole is larger than that of the upper part, a groove is arranged at the lower part in the cylindrical hole, the left side of the material pushing block is fixedly connected with the left wall of the groove through a spring, the material pushing block is connected with the inner wall of the groove in a sliding way, the lower die base is divided into an upper part and a lower part, the two parts of the lower die base are fixedly connected through a plurality of overload protection columns, when the pressure exceeds the set value of the overload protection column, the overload protection column can be broken, the pressure can be instantly released to a working area, the occurrence of accidents can be prevented, in addition, if the pressure does not exceed the set value of the overload protection column, the arrangement of the overload protection column can also play a certain buffering role on the lower die.

Preferably, the right side of the pushing block is of an inclined plane structure, the lower part of the cylindrical hole in the lower die base is positioned at the opposite side of the pushing block and is provided with a discharge port, and the bottom surface of one side of the discharge port, which is far away from the center of the lower die base, is lower than the surface of the side, which is closer to the center of the lower die base, of the side. After the punch cuts the workpiece, the waste materials can be brought into the cylindrical hole of the lower die, the side face of the pushing block is simultaneously extruded, the pushing block is pushed into the groove, the spring connected with the pushing block is compressed to contract, when the punch rises, the force of the pushing block is reduced, the pushing block is popped out under the action of the spring, the waste materials are pushed out along the discharge hole, the automatic discharge of the waste materials is realized, the manual operation is avoided, and the safety is improved.

Compared with the prior art, the invention has the beneficial effects that:

1. when multistage pneumatic cylinder extension, the gas storage bag lateral wall is stretched, the inner space increases, through one-way air valve with inside the air suction gas storage bag, make air and water smoke mix, when multistage pneumatic cylinder shrink, gas storage bag inner space reduces, the mixture of the air of its inside storage and water smoke is compressed the pressure boost, by spraying the pipeline blowout, cool off the part below going up the mould, through adopting gas-liquid mixture, improve the mixture velocity of flow through the pressure boost simultaneously, the effect of increase cooling effect has been reached.

2. When going up the mould downstream, the drift contacts the work piece position earlier, and drift top spring takes effect of buffering earlier, and when the spring extruded to the certain degree, the buffer board contacted the workpiece surface, and the cover is established and is established the buffer spring atress work on the spring guide pillar, realizes the second grade buffering, goes up the mould and moves a position after, drift top spring atress increase, carries out the buffering of third time, through the cooperation of two springs, has realized the tertiary buffering effect to the punching press process.

3. When the water smoke gathers into liquid from the blowout pipeline, partly water can flow down along with the drift surface, partly can be amassed at the buffer board upper surface, the water of accumulation at the buffer board upper surface can continue to cool off the space between buffer board and the last mould, partly water can get into the water conservancy diversion hole, these water can play the lubrication action to the relative slip between drift and the buffer board on the one hand, on the other hand, the water droplet from the drift landing is on the work piece surface, can cool down the work piece surface, the utilization ratio maximize of water has been realized.

Drawings

FIG. 1 is a schematic structural view of a multi-stage hydraulic cylinder according to the present invention in a working state;

FIG. 2 is a schematic front view of the multi-stage hydraulic cylinder of the present invention in a retracted state;

fig. 3 is a schematic view of the upper and lower dies cooperating when the punch of the present invention is at the lowermost position.

In the figure: the device comprises a multi-stage hydraulic cylinder 1, an air storage bag 2, an atomizing nozzle 21, a one-way air valve 22, a spraying pipeline 23, an upper die 3, an upper die base 31, a buffer plate 32, a punch 33, a flow guide hole 34, a lower die 4, a lower die base 41, a material pushing block 42, an overload protection column 43, a groove 44 and a discharge hole 45.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, in the embodiment of the invention, a numerical control stamping die comprises a multi-stage hydraulic cylinder 1, a gas storage bag 2, an upper die 3 and a lower die 4, the top of the gas storage bag 2 is embedded into the top of a numerical control punch, the upper surface of the gas storage bag 2 is fixedly connected with the multi-stage hydraulic cylinder 1, the multi-stage hydraulic cylinder 1 can ensure a large stroke and save space at the same time, the space utilization rate is improved, the multi-stage hydraulic cylinder 1 penetrates through the gas storage bag 2, the top of the gas storage bag 2 is provided with two round holes, each round hole is internally provided with an atomizing nozzle 21, the atomizing nozzles 21 are connected with a water channel of the numerical control punch, water mist can be sprayed into the gas storage bag 2 in a working state, the side wall of the gas storage bag 2 is made of flexible rubber, the side wall of the gas storage bag 2 is provided with eight one-way air valves 22, the one-way air valves 22 are distributed in groups in four directions of front, back and left and right, the bottom of the gas storage bag 2 is fixedly connected with the upper die holder 31, go up mould 3 and multistage hydraulic cylinder 1's piston rod fixed connection, injection pipeline 23 has been seted up to gas storage bag 2 bottom, injection pipeline 23 runs through gas storage bag 2 bottom and goes up mould 3, when multistage hydraulic cylinder 1 extends, 2 lateral walls of gas storage bag are stretched, the inner space increases, inhale inside 2 gas storage bags 2 with air through one-way air valve 22, make air and water smoke mix, when multistage hydraulic cylinder 1 contracts, 2 inner spaces of gas storage bag reduce, the mixture of the air of its inside storage and water smoke is compressed the pressure boost, spout by injection pipeline 23, cool off the part below last mould 3, through mixing gas-liquid, improve the mixture velocity of flow through the pressure boost simultaneously, the effect of increase cooling effect has been reached.

As an embodiment of the invention, the injection pipeline 23 is in a conical structure, the injection pipeline 23 is bent in the upper die 3 and points to the direction of the punch 33, the gas-liquid mixture sprayed out by the gas storage bag 2 is directly sprayed on the surface of the punch to quickly take away heat, meanwhile, the water mist is sprayed on the surface of the punch 33 to form liquid water drops, one part of the liquid water drops continuously exchanges heat, evaporates and vaporizes, and the other part of the liquid water drops downwards along with the surface of the punch 33 to play a certain lubricating role.

As an implementation mode of the invention, the upper die 3 comprises an upper die holder 31, a buffer plate 32 and a punch 33, a cylindrical hole is arranged at the center of the bottom of the upper die holder 31, the punch 33 is fixedly connected with the top of the cylindrical hole through a spring and is slidably connected with the side wall of the cylindrical hole, the punch 33 penetrates through the center of the buffer plate 32, four cylindrical deep holes are arranged at four corners of the bottom of the upper die holder 31, the buffer plate 32 is fixedly connected with the top of the cylindrical deep hole through a spring guide post, the spring guide post is slidably connected with the side wall of the cylindrical deep hole, when the upper die 3 moves downwards, the punch 33 contacts the workpiece part firstly, the spring at the top of the punch 33 plays a role for buffering, when the spring is extruded to a certain degree, the buffer plate 32 contacts the surface of the workpiece, the buffer spring on the spring guide post is stressed to do work to realize secondary buffering, after the upper die 3 runs to a certain position, the spring at the top of the punch 33 is stressed to be increased, and buffering for the third time is carried out, and a three-level buffering effect in the stamping process is realized through the matching of the two springs.

As an embodiment of the invention, four diversion holes 34 are arranged on the buffer plate 32 near the center, the diversion holes 34 are distributed in a cross shape, the upper half part of the diversion hole 34 is funnel-shaped, the lower half part of the diversion hole 34 is inclined cylindrical and points to the punch 33, the outlet of the diversion hole 34 is positioned on the inner wall of the through hole of the punch 33, when the water mist is sprayed out from the spraying pipeline 23 and gathered into a liquid state, part of the water flows down along the surface of the punch 33, and part of the water is accumulated on the upper surface of the buffer plate 32, the water accumulated on the upper surface of the buffer plate 32 can continuously cool the space between the buffer plate 32 and the upper die 3, and part of the water enters the diversion holes 34, on the one hand, the water can lubricate the relative sliding between the punch 33 and the buffer plate 32, on the other hand, the water falling from the punch 33 falls on the surface of the workpiece, so that the surface of the workpiece can be cooled, and the utilization rate of the water is improved to the maximum.

As an implementation mode of the invention, the lower die 4 comprises a lower die base 41, a material pushing block 42 and an overload protection column 43, a cylindrical hole is arranged at the center of the top of the lower die base 41, the diameter of the upper part of the cylindrical hole is approximately equal to that of the punch 33, the diameter of the lower part of the cylindrical hole is larger than that of the upper part, a groove 44 is arranged at the lower part in the cylindrical hole, the left side of the material pushing block 42 is fixedly connected with the left wall of the groove 44 through a spring, the material pushing block 42 is slidably connected with the inner wall of the groove 44, the lower die base 41 is divided into an upper part and a lower part, the two parts of the lower die base 41 are fixedly connected through a plurality of overload protection columns 43, when the pressure exceeds the set value of the overload protection column 43, the overload protection column 43 will break, and the pressure can be released instantaneously to the working area, so as to prevent accidents, in addition, if the pressure does not exceed the set value of the overload protection column 43, the overload protection column 43 can also play a certain role in buffering the lower die 41.

As an embodiment of the invention, the right side of the material pushing block 42 is an inclined plane structure, the lower part of the cylindrical hole in the lower die holder 41 is positioned at the opposite side of the material pushing block 42 and is provided with a material outlet 45, and the bottom surface of one side of the material outlet 45 far away from the center of the lower die holder 41 is lower than the side close to the center of the lower die holder 41. After the punch 33 finishes cutting the workpiece, the waste materials are brought into the cylindrical hole of the lower die 4, the side face of the material pushing block 42 is simultaneously extruded, the material pushing block is pushed into the groove 44, the spring connected with the material pushing block 42 is compressed and contracted, when the punch 33 is lifted, the material pushing block is stressed and is reduced and is popped out under the action of the spring, the waste materials are pushed out along the material outlet 45, the automatic discharge of the waste materials is realized, the manual operation is avoided, and the safety is improved.

The working principle is as follows: when the multistage hydraulic cylinder 1 extends, the side wall of the air storage bag 2 is stretched, the internal space is enlarged, air is sucked into the air storage bag 2 through the one-way air valve 22 to mix the air and water mist, when the multistage hydraulic cylinder 1 contracts, the internal space of the air storage bag 2 is reduced, the mixture of the air and the water mist stored in the air storage bag is compressed and pressurized and is sprayed out through the spraying pipeline 23 to cool the part below the upper die 3, the gas and the liquid are mixed by adopting gas and liquid, the flow rate of the mixture is increased by pressurization, the cooling effect is increased, the gas and liquid mixture sprayed out through the spraying pipeline 23 is directly sprayed on the surface of the punch 33 to quickly take away heat, meanwhile, the water mist is sprayed on the surface of the punch 33 to form liquid water drops, one part of the water drops continuously exchange heat and vaporize, the other part of the water drops slide downwards along with the surface of the punch 33 to play a certain lubricating effect, and the water drops falling from the punch 33 fall on the surface of a workpiece, the surface of a workpiece can be cooled, the utilization rate of water is improved to the maximum, when an upper die 3 moves downwards, a punch 33 contacts the part of the workpiece first, a spring at the top of the punch 33 plays a role in buffering first, when the spring is extruded to a certain degree, a buffer plate 32 contacts the surface of the workpiece, a buffer spring sleeved on a spring guide post is stressed to do work, secondary buffering is realized, after the upper die 3 moves to a certain position, the stress of the spring at the top of the punch 33 is increased, third buffering is carried out, three-stage buffering effect on a punching process is realized through the matching of the two springs, when the pressure exceeds the set value of an overload protection post 43, the overload protection post 43 can be broken, instantaneous pressure relief can be carried out on a working area, and accidents are prevented, in addition, if the pressure does not exceed the set value of the overload protection post 43, the setting of the overload protection post 43 can also play a certain role in buffering on a lower die 41, after the punch 33 finishes cutting the workpiece, the waste materials are brought into the cylindrical hole of the lower die 4, the side face of the material pushing block 42 is simultaneously extruded, the material pushing block is pushed into the groove 44, the spring connected with the material pushing block 42 is compressed and contracted, when the punch 33 is lifted, the material pushing block is stressed and is reduced and is popped out under the action of the spring, the waste materials are pushed out along the material outlet 45, the automatic discharge of the waste materials is realized, the manual operation is avoided, and the safety is improved.

The technical features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist, the above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but cannot therefore be understood as a limitation to the scope of the invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a numerical control stamping die, includes multistage pneumatic cylinder (1), gas storage bag (2), goes up mould (3), lower mould (4), its characterized in that: the top of the gas storage bag (2) is embedded into the top of the numerical control punch press, the upper surface of the gas storage bag (2) is fixedly connected with a multi-stage hydraulic cylinder (1), the multi-stage hydraulic cylinder (1) penetrates through the air storage bag (2), two round holes are formed in the top of the air storage bag (2), the circular holes are respectively provided with an atomizing nozzle (21), the atomizing nozzles (21) are connected with a water way of the numerical control punch, the side wall of the air storage bag (2) is made of flexible rubber, eight one-way air valves (22) are arranged on the side wall of the air storage bag (2), the one-way air valves (22) are distributed in four directions of front, back, left and right in a group of two, the bottom of the air storage bag (2) is fixedly connected with an upper die base (31), the upper die (3) is fixedly connected with a piston rod of the multi-stage hydraulic cylinder (1), the bottom of the air storage bag (2) is provided with an injection pipeline (23), and the injection pipeline (23) penetrates through the bottom of the air storage bag (2) and the upper die (3).

2. The numerical control stamping die of claim 1, wherein: the injection pipeline (23) is of a conical structure, and the injection pipeline (23) bends in the upper die (3) and points to the direction of the punch (33).

3. The numerical control stamping die of claim 1, wherein: the upper die (3) comprises an upper die base (31), a buffer plate (32) and a punch (33), a cylindrical hole is formed in the center of the bottom of the upper die base (31), the punch (33) is fixedly connected with the top of the cylindrical hole through a spring and is in sliding connection with the side wall of the cylindrical hole, the punch (33) penetrates through the center of the buffer plate (32), four cylindrical deep holes are formed in four corners of the bottom surface of the upper die base (31), the buffer plate (32) is fixedly connected with the top of the cylindrical deep hole through a spring guide pillar, and the spring guide pillar is in sliding connection with the side wall of the cylindrical deep hole.

4. A numerical control stamping die as defined in claim 3, wherein: four diversion holes (34) have been seted up near central point on buffer board (32), diversion hole (34) are the cross and distribute, diversion hole (34) first half is the infundibulate, diversion hole (34) second half is the columniform and directional drift (33) of slope, diversion hole (34) export is located the inner wall of drift (33) through hole.

5. The numerical control stamping die of claim 1, wherein: lower mould (4) are including die holder (41), ejector pad (42) and overload protection post (43), cylindrical hole has been seted up at the middle position in die holder (41) top, cylindrical hole upper portion diameter is approximately equal with drift (33), cylindrical hole lower part diameter is greater than upper portion, recess (44) are seted up to the downthehole lower part of cylinder type, ejector pad (42) left side is through spring and recess (44) left wall fixed connection, ejector pad (42) and recess (44) inner wall sliding connection, die holder (41) divide into two parts from top to bottom, die holder (41) two parts are through a plurality of overload protection post (43) fixed connection.

6. The numerical control stamping die of claim 5, wherein: the right side of the material pushing block (42) is of an inclined plane structure, the lower part of a cylindrical hole in the lower die base (41) is positioned at the opposite side of the material pushing block (42) and is provided with a material outlet (45), and the bottom surface of one side of the material outlet (45) far away from the center of the lower die base (41) is lower than the side of the material outlet close to the center of the lower die base (41).