CN115111298A

CN115111298A - Pneumatic buffer mechanism and mould with same

Info

Publication number: CN115111298A
Application number: CN202210573133.2A
Authority: CN
Inventors: 董琪; 詹超
Original assignee: Individual
Current assignee: Dongguan Xulida Precision Technology Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-09-27
Anticipated expiration: 2042-05-24
Also published as: CN115111298B

Abstract

The invention belongs to the technical field of buffer mechanisms, in particular to a pneumatic buffer mechanism and a die with the same, which comprises a cylinder body, a piston device, a spring, an upper die and a lower die, wherein the cylinder body is fixedly connected with two sides of the lower die, the piston device is arranged in the cylinder body, the spring is fixedly connected with the upper surface of the cylinder body and the piston device, impact blocks are arranged on two sides of the upper die, the cylinder body comprises an outer cylinder body and an inner cylinder body, the outer surface of the outer cylinder body is fixedly connected with the lower die, the inner cylinder body is fixedly connected with the bottom of the outer cylinder body, a first piston rod penetrates through the upper part of the outer cylinder body to be connected with the outside, a first piston is fixedly connected with one side of the first piston rod, which is far away from the upper die, a second piston rod is fixedly connected with one side of the first piston, which is far away from the first piston rod, so that the service life of the buffer mechanism is prolonged, compared with a nitrogen spring buffer mechanism, the pneumatic buffer mechanism reduces the manufacturing and using cost of the buffer mechanism.

Description

Pneumatic buffer mechanism and mould with same

Technical Field

The invention belongs to the technical field of buffer mechanisms, and particularly relates to a pneumatic buffer mechanism and a die with the same.

Background

The die is various dies and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. In short, a mold is a tool used to make a shaped article, the tool being made up of various parts, different molds being made up of different parts. The method realizes the processing of the appearance of the article mainly by changing the physical state of the formed material, and the article is called as 'industrial mother'.

In the process of manufacturing workpieces by using a die for stamping, a stamping machine generally adopts hydraulic drive, the downward movement process of the die is driven by hydraulic action during stamping, the upper die is directly in rigid contact with the lower die for stamping, the die can be worn and loosened along with the extension of service life, and therefore, a corresponding buffer mechanism can be installed during the use of the die and is used for buffering the excessive pressure of the upper die, so that the stamping quality is ensured, the wear of the die is reduced, the service life of the die is prolonged, but the buffer mechanism installed by the existing die generally uses a nitrogen spring or a common spring for buffering, the buffer effect is single, the buffer capacity is limited, different buffer strokes cannot be set according to actual stamping materials, the universality is low, and the common spring is easy to age and lose elasticity.

In view of this, in order to overcome the above technical problems, the present invention provides a pneumatic buffer mechanism and a mold having the same, which solve the above technical problems.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the buffering mechanism of the existing die installation generally uses a nitrogen spring or a common spring for buffering, the buffering effect is single, the buffering capacity is limited, different buffering strokes can not be set according to actual stamping materials, the universality is low, and the common spring is easy to age and lose elasticity.

The invention provides a pneumatic buffer mechanism which comprises a cylinder body, a piston device, a spring, an upper die and a lower die, wherein the cylinder body is fixedly connected to two sides of the lower die;

the cylinder body comprises an outer cylinder body and an inner cylinder body, the outer surface of the outer cylinder body is fixedly connected with the lower die, and the inner cylinder body is fixedly connected with the bottom of the outer cylinder body;

piston device includes a piston rod, a piston, No. two piston rods, No. two pistons, a cavity and buffer block, a piston rod passes outer cylinder body upper portion and links to each other with the external world, mould one side fixed connection is kept away from to a piston and a piston rod, No. two piston rods and a piston keep away from a piston rod one side fixed connection, No. two pistons and No. two piston rods keep away from a piston one side fixed connection, be equipped with a cavity in the piston rod, be equipped with the buffer block in the cavity, buffer block and a piston rod threaded connection.

Preferably, the first piston divides the outer cylinder body into an upper chamber and a lower chamber, the upper surface of the lower die is provided with an air hole, the upper chamber is communicated with the air hole through a first air passage, and a one-way air inlet valve communicated to the upper chamber is arranged in the first air passage.

Preferably, the bottom stamping surface of the lower die is provided with micropores, the micropores are communicated with the upper cavity through a second air passage, and a one-way air outlet valve leading to the micropores is arranged in the second air passage.

Preferably, be equipped with the back taper recess on the buffer block, the shape of impact piece is the back taper arch, and the shape that is equipped with the back taper recess on the buffer block and strikes the piece cooperatees the guide and the buffering that realize the last mould for the back taper is protruding.

Preferably, be equipped with the arch in the back taper recess of buffer block, be equipped with No. two cavities in the impact block, be equipped with the elasticity gasbag in No. two cavities, impact block mould punching press one side is equipped with No. three air flues and elasticity gasbag intercommunication.

A mold uses the pneumatic cushion mechanism.

The invention has the following beneficial effects:

1. according to the pneumatic buffering device provided by the invention, after triple buffering of the spring, the first piston and the second piston, damage to a workpiece is reduced during stamping of the upper die, the quality of a stamped product is improved, and compared with the defects that a common spring buffering mechanism is easy to age and weaken in elasticity during long-term use, the service life of the buffering mechanism is prolonged by the pneumatic buffering mechanism, and compared with a nitrogen spring buffering mechanism, the manufacturing and using cost of the buffering mechanism is reduced by the pneumatic buffering mechanism.

2. The pneumatic buffering device provided by the invention is beneficial to keeping the punching position of a workpiece to be punched fixed during punching, so that the punching quality is improved, the air pumped into the upper cavity absorbs heat generated during the working of the outer cylinder body, the outer cylinder body is cooled, the phenomenon of cylinder body strength reduction caused by deformation of the outer cylinder body due to thermal expansion is reduced, the service life of the outer cylinder body is prolonged, and the actual using effect of the pneumatic buffering mechanism is improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a body diagram of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

in the figure: the cylinder block 1, the piston device 2, the spring 3, the upper die 4, the lower die 5, the outer cylinder 11, the inner cylinder 12, the upper chamber 13, the lower chamber 14, the first piston rod 21, the first piston 22, the second piston rod 23, the second piston 24, the first cavity 25, the buffer block 26, the protrusion 27, the impact block 41, the second cavity 42, the elastic airbag 43, the third air passage 44, the air hole 51, the first air passage 52, the one-way air inlet valve 521, the micropore 53, the second air passage 54 and the one-way air outlet valve 541.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

The invention provides a pneumatic buffer mechanism which comprises a cylinder body 1, a piston device 2, a spring 3, an upper die 4 and a lower die 5, wherein the cylinder body 1 is fixedly connected to two sides of the lower die 5, the piston device 2 is arranged in the cylinder body 1 and moves up and down along the cylinder body 1 during work, the spring 3 is fixedly connected with the upper surface of the cylinder body 1 and the piston device 2, and impact blocks 41 are arranged on two sides of the upper die 4;

the cylinder block 1 comprises an outer cylinder block 11 and an inner cylinder block 12, the outer surface of the outer cylinder block 11 is fixedly connected with the lower die 5, and the inner cylinder block 12 is fixedly connected with the bottom of the outer cylinder block 11;

the piston device 2 comprises a first piston rod 21, a first piston 22, a second piston rod 23, a second piston 24, a first cavity 25 and a buffer block 26, the first piston rod 21 penetrates through the upper part of the outer cylinder body 11 to be connected with the outside, the first piston 22 and the first piston rod 21 are fixedly connected with one side of the upper die 4 away from the upper die, the second piston rod 23 and the first piston 22 are fixedly connected with one side of the first piston rod 21 away from the first piston rod 24, the second piston rod 23 and one side of the second piston rod 23 away from the first piston 22 are fixedly connected, the first cavity 25 is arranged in the first piston rod 21, the buffer block 26 is arranged in the first cavity 25, and the buffer block 26 is in threaded connection with the first piston rod 21;

before the pneumatic buffer mechanism works, firstly, the buffer block 26 is rotationally adjusted to a corresponding buffer height according to the requirement and the material thickness of a stamping part, then the upper die 4 performs downward stamping, when the upper die 4 moves downward, the impact block 41 is matched with the buffer blocks 26 on the piston devices 2 in the cylinder block 1 at two sides of the lower die 5, the buffer blocks 26 at two sides of the lower die 5 move downward along with the impact block 41, the spring 3 fixedly connected between the upper surface of the cylinder block 1 and the piston devices 2 is extruded to buffer the piston devices 2 and the upper die 4, meanwhile, the first piston rod 21 spirally connected with the buffer block 26 drives the first piston 22 to move downward together, the first piston 22 extrudes air in the outer cylinder block 11 downward, the piston devices 2 moving downward are buffered by upward force of compressed air, so that the piston devices 2 and the upper die 4 are buffered again, when the second piston 24 on the piston devices 2 is pressed into the inner cylinder 12, the second piston 24 is buffered by the extruded gas in the inner cylinder body 12, further the third buffering is realized for the piston device 2 and the upper die 4, after triple buffering of the spring 3, the first piston 22 and the second piston 24, the damage to a workpiece is reduced during stamping of the upper die 4, the quality of a stamped product is improved, and compared with the defects that a common spring buffering mechanism is easy to age and weaken in elasticity during long-time use, the service life of the buffering mechanism is prolonged by the pneumatic buffering mechanism, and compared with a nitrogen spring buffering mechanism, the manufacturing and using cost of the buffering mechanism is reduced by the pneumatic buffering mechanism.

As an embodiment of the present invention, the first piston 22 divides the outer cylinder block 11 into an upper chamber 13 and a lower chamber 14, the upper surface of the lower mold 5 is provided with an air hole 51, the upper chamber 13 is communicated with the air hole 51 through a first air passage 52, and a one-way air inlet valve 521 leading to the upper chamber 13 is arranged in the first air passage 52;

when the first piston 22 downwardly extrudes air in the lower cavity 14 of the outer cylinder body 11, the space of the upper cavity 13 is increased, at the moment, air between the workpiece to be punched and the air hole 51 on the upper surface of the lower die 5 is drawn into the upper cavity 13 through the first air passage 52, after the air between the workpiece to be punched and the air hole 51 is drawn, the workpiece to be punched is attached to the surface of the lower die 5, the workpiece to be punched is favorable for keeping the punching position fixed during punching, the punching quality is improved, the air drawn into the upper cavity 13 absorbs heat generated when the outer cylinder body 11 works, the outer cylinder body 11 is cooled, the phenomenon that the strength of the cylinder body is reduced due to deformation when the outer cylinder body 11 is heated and expanded is reduced, the service life of the outer cylinder body 11 is prolonged, and the actual use effect of the pneumatic buffer mechanism is improved.

As a specific embodiment of the present invention, the bottom stamping surface of the lower die 5 is provided with a micro-hole 53, the micro-hole 53 is communicated with the upper chamber 13 through a second air passage 54, and a one-way air outlet valve 541 leading to the micro-hole 53 is arranged in the second air passage 54;

after the work piece punching press is accomplished, go up mould 4 upward movement and reset, buffer 2 resets under the effect of the cylinder internal gas pressure and spring 3 the time, when piston 22 upwards resets, cavity 14 volume increase under the outer cylinder body 11, cavity 13 volume reduction in the upper chamber, the gas after the absorbed heat in the upper chamber 13 is discharged from micropore 53 through No. two air flues 54, the partial heat that produces during operation also discharges along with gas in the outer cylinder body 11, further cool off the heat dissipation to outer cylinder body 11, the work piece after the punching press is accomplished is blown out through No. two air flues 54 direction micropore 53 to the combustion gas simultaneously, make the work piece after the punching press conveniently collect, the practical use effect of pneumatic buffer has further been improved.

As a specific embodiment of the present invention, an inverted cone-shaped groove is arranged on the buffer block 26, the impact block 41 is in the shape of an inverted cone-shaped protrusion, and the inverted cone-shaped groove arranged on the buffer block 26 is matched with the inverted cone-shaped protrusion of the impact block 41 to realize guiding and buffering of the upper mold 4;

when the upper die 4 moves downwards in a stamping mode, the inverted cone-shaped protrusion of the impact block 41 is matched with the inverted cone-shaped groove of the buffer block 26, the upper die 4 is finely adjusted and guided to a correct stamping position before a workpiece is stamped, and the actual using effect of the pneumatic buffer mechanism is further improved.

As a specific embodiment of the invention, a protrusion 27 is arranged in an inverted cone-shaped groove of the buffer block 26, a second cavity 42 is arranged in the impact block 41, an elastic air bag 43 is arranged in the second cavity 42, and a third air passage 44 communicated with the elastic air bag 43 is arranged on one stamping side of a die of the impact block 41;

along with last mould 4 and the continuation of bed die 5 stamping process, the heat of punching press position can increase gradually on mould 4 and the bed die 5, when the arch 27 on buffer block 26 extrudes the elasticity gasbag 43 in the No. two cavity 42 in the impact block 41, the air in the elasticity gasbag 43 is extruded, the air of being extruded blows on mould 4 and bed die 5, dispels the heat to mould 4 and bed die 5, the emergence of mould 4 and the bed die 5 deformation phenomenon has been reduced because of expend with heat and contract with cold has further improved pneumatic buffer gear's actual use effect again.

A mold uses the pneumatic cushion mechanism.

The specific working process is as follows:

before the pneumatic buffer mechanism works, firstly, the buffer block 26 is rotationally adjusted to a corresponding buffer height according to the requirement and the material thickness of a stamping part, then the upper die 4 performs downward stamping, when the upper die 4 moves downward, the impact block 41 is matched with the buffer blocks 26 on the piston devices 2 in the cylinder block 1 at two sides of the lower die 5, the inverted cone-shaped bulge of the impact block 41 is matched with the inverted cone-shaped groove of the buffer block 26, the upper die 4 is finely adjusted and guided to a correct stamping position before stamping a workpiece, the bulge 27 on the buffer block 26 extrudes the elastic air bag 43 in the cavity II 42 in the impact block 41, the air in the elastic air bag 43 is extruded, the extruded air is blown onto the upper die 4 and the lower die 5 to cool the upper die 4 and the lower die 5, the buffer blocks 26 at two sides of the lower die 5 move downward along with the impact block 41, and the spring 3 fixedly connected between the upper surface of the cylinder block 1 and the piston devices 2 is extruded, then, a first piston rod 21 in threaded connection with a buffer block 26 drives a first piston 22 to move downwards together, the first piston 22 extrudes air in the outer cylinder body 11 downwards, the piston device 2 which moves downwards is buffered by upward force of compressed air, finally, when a second piston 24 on the piston device 2 is pressed into the inner cylinder body 12 downwards, the second piston 24 is buffered by the extruded air in the inner cylinder body 12, meanwhile, the space of the upper chamber 13 is increased, air between a workpiece to be punched and an air hole 51 on the upper surface of the lower die 5 is extracted into the upper chamber 13 through a first air channel 52, and the workpiece to be punched is attached to the surface of the lower die 5 after the air between the workpiece to be punched and the air hole 51 is extracted;

after the workpiece is stamped, the upper die 4 moves upwards to reset, the buffer device 2 resets under the action of air pressure in the cylinder and the spring 3, when the piston 22 resets upwards, the volume of the lower cavity 14 in the outer cylinder body 11 is increased, the volume of the upper cavity 13 is reduced, the gas in the upper cavity 13 after absorbing heat is discharged from the micropores 53 through the second air channel 54, part of heat generated during working in the outer cylinder body 11 is discharged along with the gas, and meanwhile, the discharged gas is guided to the micropores 53 through the second air channel 54 to blow out the stamped workpiece.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A pneumatic buffer gear which characterized in that: the cylinder body (1), the piston device (2), the spring (3), the upper die (4) and the lower die (5) are included, the cylinder body (1) is fixedly connected to two sides of the lower die (5), the piston device (2) is arranged in the cylinder body (1) and moves up and down along the cylinder body (1) during work, the spring (3) is fixedly connected with the upper surface of the cylinder body (1) and the piston device (2), and the impact blocks (41) are arranged on two sides of the upper die (4);

the cylinder body (1) comprises an outer cylinder body (11) and an inner cylinder body (12), the outer surface of the outer cylinder body (11) is fixedly connected with the lower die (5), and the inner cylinder body (12) is fixedly connected with the bottom of the outer cylinder body (11);

piston device (2) include piston rod (21), piston (22), No. two piston rods (23), No. two pistons (24), cavity (25) and buffer block (26), piston rod (21) pass outer cylinder block (11) upper portion and link to each other with the external world, mould (4) one side fixed connection is kept away from with piston rod (21) to piston (22), piston rod (21) one side fixed connection is kept away from with piston (22) No. two, No. two piston (24) keep away from piston (22) one side fixed connection with No. two piston rods (23), be equipped with cavity (25) in piston rod (21), be equipped with buffer block (26) in cavity (25), buffer block (26) and piston rod (21) threaded connection.

2. A pneumatic damping mechanism according to claim 1, wherein: piston (22) will be outer cylinder body (11) and separate for last cavity (13) and lower cavity (14), bed die (5) upper surface is equipped with air vent (51), go up cavity (13) and be linked together through an air flue (52) and air vent (51), be equipped with one-way admission valve (521) to last cavity (13) in an air flue (52).

3. A pneumatic damping mechanism according to claim 2, wherein: the punching bottom surface of the lower die (5) is provided with micropores (53), the micropores (53) are communicated with the upper chamber (13) through a second air passage (54), and a one-way air outlet valve (541) leading to the micropores (53) is arranged in the second air passage (54).

4. A pneumatic damping mechanism according to claim 1, wherein: be equipped with the back taper recess on buffer block (26), the shape that strikes piece (41) is the back taper arch, and the shape that is equipped with back taper recess on buffer block (26) and strikes piece (41) cooperatees the guide and the buffering that realize going up mould (4) for the back taper is protruding.

5. A pneumatic damping mechanism according to claim 4, wherein: be equipped with arch (27) in the back taper recess of buffer block (26), be equipped with No. two cavities (42) in impact piece (41), be equipped with elasticity gasbag (43) in No. two cavities (42), impact piece (41) mould punching press one side is equipped with No. three air flue (44) and elasticity gasbag (43) intercommunication.

6. A mold, characterized in that: the die uses the pneumatic cushion mechanism described in claims 1-5 above.