CN109909695B - Method for forming piston of rubber air spring - Google Patents
Method for forming piston of rubber air spring Download PDFInfo
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- CN109909695B CN109909695B CN201910232092.9A CN201910232092A CN109909695B CN 109909695 B CN109909695 B CN 109909695B CN 201910232092 A CN201910232092 A CN 201910232092A CN 109909695 B CN109909695 B CN 109909695B
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Abstract
The invention relates to a method for forming a piston of a rubber air spring, and belongs to the field of manufacturing of rubber air springs. The method for forming the piston of the rubber air spring comprises the following steps of: stamping a metal plate to form a cylindrical part, wherein one end of the cylindrical part is convexly provided with an operation convex part, and the end of the cylindrical part, which is far away from the operation convex part, is an opening end; turning over the cylindrical portion so that the open end faces a first mold, the first mold having a first cavity formed therein, the first cavity having a diameter that gradually decreases in a direction away from the cylindrical portion; and driving the cylindrical part to move towards the first die, wherein the periphery of the cylindrical part is pressed against the peripheral surface of the first cavity so as to force the periphery of the cylindrical part to bend inwards and deform. The piston forming method facilitates forming a cylindrical piston.
Description
Technical Field
The invention relates to the technical field of metal part forming, in particular to a piston forming method of a rubber air spring.
Background
The rubber air spring is an elastic component, and the elastic action is realized by filling compressed air into the air spring and utilizing the compressibility of the air. Rubber air springs have many of the characteristics of superior metal springs: the rubber air spring has nonlinear characteristics, and a characteristic line of the rubber air spring can be designed into a relatively ideal curve according to requirements; the stiffness of the rubber air spring varies with the load, so that the spring device has ideal characteristics: the rubber air spring can bear axial and radial loads at the same time and can also transmit torque: the rubber air spring can obtain different bearing capacities by adjusting the internal pressure.
For example, chinese patent publication No. CN107218329A discloses a rubber air spring and its application. The rubber air spring comprises a rubber air spring main body, the rubber air spring main body comprises at least one lantern-shaped structural body, and the rubber air spring main body comprises an outer rubber layer, a first layer of cord fabric and a shaping layer of cord fabric from outside to inside. The rubber air spring has the advantages of reasonable design and compact structure, can be used as an air stroke regulator, has compact original height, large bending angle, no need of maintenance and lubrication, no need of an internal operating rod or piston, simple and easy installation and high allowable working pressure.
However, a piston is disposed in the general rubber air spring, and the piston is in a metal cylinder shape and includes a first ring portion with an enlarged diameter and a shaped ring portion with a smaller diameter. Because first ring portion with design ring portion integrated into one piece and diameter difference are great, are difficult to guarantee at stamping forming in-process first ring portion with smooth transition between the design ring portion makes the shaping of piston is difficult.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for forming a piston of a rubber air spring, which is convenient for forming the piston.
In order to achieve the purpose, the invention provides the following technical scheme:
a piston forming method of a rubber air spring comprises the following steps: stamping a metal plate to form a cylindrical part, wherein one end of the cylindrical part is convexly provided with an operation convex part, and the end of the cylindrical part, which is far away from the operation convex part, is an opening end; turning over the cylindrical portion so that the open end faces a first mold, the first mold having a first cavity formed therein, the first cavity having a diameter that gradually decreases in a direction away from the cylindrical portion; driving the cylindrical part to move towards the first die, wherein the periphery of the cylindrical part is pressed against the peripheral surface of the first cavity so as to force the periphery of the cylindrical part to be bent and deformed inwards; driving the cylindrical part to move towards a shaping mold, wherein a shaping cavity is formed in the shaping mold, the diameter of the shaping cavity is gradually reduced along the direction far away from the cylindrical part, and the maximum diameter of the shaping cavity is smaller than that of the first cavity; and the periphery of the cylindrical part is pressed against the peripheral surface of the shaping cavity, so that the periphery of the cylindrical part is forced to be bent inwards again to form the cylindrical piston.
With the above-described configuration, since the one end of the cylindrical piston has a small diameter, there is a problem that molding is generally difficult when forming the end portion of the cylindrical piston. In the piston forming method, after the end part of the cylindrical piston is impacted by the first die, the end part of the cylindrical piston is impacted again by the shaping die, and a progressive forming mode is adopted, so that the forming efficiency and accuracy are improved, and the piston is convenient to form.
Further, the cylindrical piston includes a cylindrical portion and a tapered annular portion formed at one end of the cylindrical portion, the cylindrical portion having a diameter larger than that of the tapered annular portion.
By adopting the technical scheme, the tapered annular part is formed, so that the subsequent assembly process of the piston is facilitated.
Further, the diameter of the cylindrical portion is 1.5 to 2 times the diameter of the tapered annular portion.
By adopting the technical scheme, the performance of the piston is better by setting the diameter size.
Further, after the step of forming the barrel piston, the steps of: and welding a metal retainer ring at one end of the cylindrical part, which is far away from the operation convex part.
By adopting the technical scheme, the metal retainer ring is welded, so that the subsequent rubber cylinder is convenient to install.
Further, the welding method is spot welding, and the outer diameter of the metal retainer ring is equal to the outer diameter of the cylindrical portion.
By adopting the technical scheme, the metal check ring is convenient to fix by adopting a spot welding mode.
Further, the method also comprises the following steps after the step of welding the metal retainer ring: a metal reinforcing ring is pressed into the tapered annular portion.
By adopting the technical scheme, the structural strength of the tapered annular part is improved conveniently through the metal reinforcing ring.
Further, the length of the tapered annular portion is greater than the length of the cylindrical portion, and the tapered annular portion is smoothly connected with the cylindrical portion.
By adopting the technical scheme, the connection part of the gradually reducing annular part and the cylindrical part is not too abrupt or too rough, so that subsequent sleeving and installation of the rubber tube are facilitated.
Furthermore, the operation convex part is round platform shape, the periphery of operation convex part is formed with the card and is established the face and be equipped with the ring channel in the concave, the card is established the face and is located one side of ring channel.
By adopting the technical scheme, the operation convex part is clamped and rotated by conveniently utilizing a tool to be positioned on the clamping surface, and then the cylindrical piston is rotated.
Further, before the step of driving the cylindrical portion to move toward the sizing die, the method further comprises the steps of: driving the cylindrical part to move towards a second mould, wherein a second cavity is formed in the second mould, the diameter of the second cavity is gradually reduced along the direction far away from the cylindrical part, and the maximum diameter of the second cavity is smaller than that of the first cavity; the maximum diameter of the second cavity is larger than that of the shaping cavity, and the periphery of the cylindrical part is pressed against the peripheral surface of the second cavity to force the periphery of the cylindrical part to bend inwards and deform.
By adopting the technical scheme, the impact frequency of the cylindrical piston is increased, the progressive property of the forming method is improved, and the forming precision is improved.
Further, before the step of driving the cylindrical portion to move toward the sizing die, the method further comprises the steps of: driving the cylindrical part to move towards a third mould, wherein a third cavity is formed in the third mould, the diameter of the third cavity is gradually reduced along the direction far away from the cylindrical part, and the maximum diameter of the third cavity is smaller than that of the second cavity; the maximum diameter of the third cavity is larger than that of the shaping cavity, and the periphery of the cylindrical part is pressed against the peripheral surface of the third cavity to force the periphery of the cylindrical part to bend inwards and deform.
By adopting the technical scheme, the impact frequency of the cylindrical piston reaches four times, the progressive property of the forming method is greatly improved, and the forming precision of the cylindrical piston is improved.
In conclusion, the invention has the following beneficial effects:
1. when the first die and the sizing die are used for impact, since one end of the cylindrical piston has a small diameter, a problem generally arises that molding is difficult when the end of the cylindrical piston is formed. In the piston forming method, after the end part of the cylindrical piston is impacted by the first die, the end part of the cylindrical piston is impacted again by the shaping die, and a progressive forming mode is adopted, so that the forming efficiency and accuracy are improved, and the piston is convenient to form;
2. through the adoption of the second die and the third die, the impact times of the cylindrical piston are increased, the progressive property of the forming method is improved, and the forming precision is improved.
Drawings
Fig. 1 is a perspective view of a barrel piston according to an embodiment.
Fig. 2 is a perspective view of the barrel piston of fig. 1 from another perspective.
Fig. 3 is a schematic flow chart illustrating steps of a method for forming a piston of a rubber air spring according to an embodiment.
Fig. 4 is a perspective view of a barrel piston and a grinding mechanism according to an embodiment.
Fig. 5 is a perspective view of the barrel piston and grinding mechanism of fig. 4 from another perspective.
Figure 6 is a cross-sectional schematic view of a sanding housing and a rotating electrical machine according to one embodiment.
FIG. 7 is a flowchart illustrating steps of a polishing method according to an embodiment.
In the figure, 100, a barrel piston; 10. a cylindrical portion; 11. an operating projection; 111. a clamping surface; 113. an annular groove; 20. a tapered annular portion; 21. a metal retainer ring; 23. a metal reinforcing ring; 30. a polishing mechanism; 40. a rotating electric machine; 41. a housing; 43. an output shaft; 48. a guide bar; 50. polishing the casing; 51. a breather pipe; 511. a gas channel; 513. a mating end; 5135. a mating groove; 514. an air outlet; 52. polishing the sleeve; 521. fixing the circular plate; 5215. a chip groove; 522. grinding a ring; 5225. polishing the space; 53. grinding a ring on the cambered surface; 531. arc-shaped polishing strips; 5315. a chip discharge gap; 5318. grinding the surface in an arc shape; 5319. perforating holes; 54. a metal piston; 545. a pushing sheet; 548. a gas blowing hole; 55. a positioning ring; 60. the air pump is pushed.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 3, a method for forming a piston of a rubber air spring includes the following steps:
in step S101, a metal plate is pressed to form a cylindrical portion 10, an operation protrusion 11 is protruded at one end of the cylindrical portion 10, and an end of the cylindrical portion 10 away from the operation protrusion 11 is an opening end; for example, the operation protrusion 11 is formed by impact at the same time as the cylindrical portion 10 is formed by impact of a metal plate material.
In step S102, the cylindrical portion 10 is turned over to make the opening end face a first mold (not shown), the first mold having a first cavity formed thereon, the diameter of the first cavity gradually decreasing in a direction away from the cylindrical portion 10;
in step S103, the cylindrical portion 10 is driven to move toward the first mold, and the periphery of the cylindrical portion 10 abuts against the peripheral surface of the first cavity, so as to force the periphery of the cylindrical portion 10 to bend inward;
in step S104, the cylindrical portion 10 is driven to move towards a shaping mold (not shown), wherein a shaping cavity is formed on the shaping mold, the diameter of the shaping cavity gradually decreases along a direction away from the cylindrical portion 10, and the maximum diameter of the shaping cavity is smaller than the maximum diameter of the first cavity; and
in step S105, the periphery of the cylindrical portion 10 is pressed against the peripheral surface of the molding cavity, so as to force the periphery of the cylindrical portion 10 to bend inward again to form the cylindrical piston 100.
Since one end of the barrel piston 100 has a small diameter, a problem generally arises in that molding is difficult when forming the end of the barrel piston 100. In the above piston forming method, after the first mold is used to impact the end of the cylindrical piston 100, the shaping mold is used to impact the end of the cylindrical piston 100 again, and a progressive forming manner is used, so that the forming efficiency and accuracy are improved, and the piston is conveniently formed.
Specifically, the cylindrical piston 100 includes a cylindrical portion 10 and a tapered annular portion 20 formed at one end of the cylindrical portion 10, and the diameter of the cylindrical portion 10 is larger than the diameter of the tapered annular portion 20. The diameter of the cylindrical portion 10 is 1.5-2 times the diameter of the tapered annular portion 20. After the step of forming the barrel piston 100, the steps of: a metal collar 21 is welded to an end of the cylindrical portion 10 facing away from the operating projection 11. The welding method is spot welding, and the outer diameter of the metal retainer ring 21 is equal to the outer diameter of the cylindrical portion 10. The step of welding the metal retainer ring 21 further includes the following steps: a metal reinforcing ring 23 is pressed into the tapered annular portion 20. The length of the tapered annular portion 20 is greater than the length of the cylindrical portion 10, and the tapered annular portion 20 is smoothly connected to the cylindrical portion 10. The operation convex part 11 is in a circular truncated cone shape, a clamping surface 111 is formed on the periphery of the operation convex part 11, an annular groove 113 is concavely formed on the periphery of the operation convex part 11, and the clamping surface 111 is located on one side of the annular groove 113. Before the step of driving the cylindrical portion 10 towards the sizing die, the method further comprises the steps of: driving the cylindrical part 10 to move towards a second mold, wherein a second cavity is formed on the second mold, the diameter of the second cavity is gradually reduced along the direction far away from the cylindrical part 10, and the maximum diameter of the second cavity is smaller than that of the first cavity; the maximum diameter of the second cavity is larger than that of the shaping cavity, and the periphery of the cylindrical part 10 is pressed against the peripheral surface of the second cavity, so that the periphery of the cylindrical part 10 is forced to bend inwards and deform. For example, the step of driving the cylindrical portion 10 toward the sizing die further includes the steps of: driving the cylindrical portion 10 towards a third mould (not shown) having a third cavity formed therein, the diameter of the third cavity decreasing in a direction away from the cylindrical portion 10, the maximum diameter of the third cavity being smaller than the maximum diameter of the second cavity; the maximum diameter of the third cavity is larger than that of the shaping cavity, and the periphery of the cylindrical part 10 is pressed against the peripheral surface of the third cavity, so that the periphery of the cylindrical part 10 is forced to bend inwards and deform.
By forming the tapered annular portion 20, the subsequent assembly process of the piston is facilitated. By dimensioning the diameter of the cylindrical part 10, the piston performance is made better. The metal retainer ring 21 is welded, so that the subsequent rubber cylinder is convenient to mount. By adopting the spot welding mode, the fixing arrangement of the metal retainer ring 21 is facilitated. The structural strength of the tapered annular portion 20 is thereby facilitated to be increased by the metal reinforcement ring 23. The tapered annular portion 20 is smoothly connected to the cylindrical portion 10, so that the connection between the tapered annular portion 20 and the cylindrical portion 10 is not too abrupt or too rough, thereby facilitating the subsequent sleeving and installation of the rubber tube. Through the setting of card setting face 111, conveniently utilize the instrument to be located card setting face 111 blocks and rotates operation convex part 11, and then rotatory cylindric piston 100. The second mold and the third mold increase the number of times of impact of the cylindrical piston 100, which is beneficial to improving the progressive property of the molding method and the molding precision, so that the number of times of impact of the cylindrical piston 100 can be finally four, the progressive property of the molding method is greatly improved, and the molding precision of the cylindrical piston 100 is improved.
Referring to fig. 4 to 6, for example, in order to improve the surface accuracy of the cylindrical piston 100, after the step of pressing the metal reinforcing ring 23 into the tapered annular portion 20, the method for forming the piston of the rubber air spring further includes the following steps: adopt grinding machanism 30 to polish cylindric piston 100, wherein grinding machanism 30 includes rotating electrical machines 40, grinding shell 50 and promotion air pump 60, rotating electrical machines 40 set up in the inside of convergent annular portion 20, rotating electrical machines 40 includes casing 41, drive structure (not shown), drive subject (not shown) and output shaft 43, casing 41 set up in the convergent annular portion 20, casing 41's relative both sides are provided with arc locating piece (not shown) respectively, two arc locating pieces can be followed casing 41's radial direction is flexible. The driving structure is disposed in the housing 41 and connected to the two arc-shaped positioning blocks, and is configured to drive the two arc-shaped positioning blocks to extend, so as to force the arc-shaped surfaces of the arc-shaped positioning blocks to tightly abut against the inner surface of the tapered annular portion 20, so as to position the rotating electrical machine 40. The drive body is disposed within the housing 41 and the output shaft 43 is connected to the drive body and is disposed coaxially with the tapered annular portion 20. The end of the output shaft 43 protrudes out of the tapered annular portion 20, and the outer circumference of the end of the output shaft 43 is formed with external threads. The polishing sleeve 50 is screwed on the end of the output shaft 43 and sleeved on the tapered annular portion 20, and the polishing sleeve 50 is driven by the rotating motor 40 to rotate so as to polish the surface of the tapered annular portion 20.
For example, the sanding sleeve housing 50 includes a vent pipe 51, a sanding sleeve 52 and a cambered sanding ring 53, a gas passage 511 is formed in the vent pipe 51, one end of the vent pipe 51 facing the tapered annular portion 20 is a mating end 513, the mating end 513 is a closed end, a plurality of gas outlets 514 are formed on the periphery of the mating end, the plurality of gas outlets 514 are all communicated with the gas passage 511, and the plurality of gas outlets 514 are all located inside the sanding sleeve 52. A matching groove 5135 is formed on the end surface of the matching end 513, an internal thread is formed on the inner circumferential surface of the matching groove 5135, an external thread is formed on the end periphery of the output shaft 43 of the rotating electrical machine 40, and the external thread is screwed with the internal thread of the matching groove 5135, so that the output shaft 43 can be detachably screwed on the vent pipe 51. The polishing sleeve 52 is fixedly sleeved on the vent pipe 51. The polishing sleeve 52 comprises a fixed circular plate 521 and a polishing ring 522, wherein the fixed circular plate 521 is fixedly sleeved on the vent pipe 51 and is coaxially arranged with the vent pipe 51. The fixed circular plate 521 and the end surface of the tapered annular portion 20 are spaced from each other, a plurality of flutes 5215 are formed through the fixed circular plate 521, and the flutes 5215 are disposed around the vent pipe 51. The grinding ring 522 surrounds the periphery of the fixed circular plate 521 and is vertically and convexly arranged on the fixed circular plate 521, the grinding ring 522 is sleeved outside the tapered annular part 20, a friction surface is arranged on the inner circumferential surface of the grinding ring 522, a grinding space 5225 is formed in the grinding ring 522, the matching end 513 of the vent pipe 51 is positioned in the grinding space 5225, the outer diameter of the matching end 513 is larger than the inner diameter of the tapered annular part 20, and the matching end 513 abuts against the end surface of the tapered annular part 20. The cambered surface polishing ring 53 is arranged at the periphery of one end, far away from the fixed circular plate 521, of the polishing ring 522, the cambered surface polishing ring 53 comprises a plurality of arc-shaped polishing strips 531, the arc-shaped polishing strips 531 are arranged around the periphery of the polishing ring 522, a scrap outlet gap 5315 is formed between every two adjacent arc-shaped polishing strips 531, an arc-shaped polishing surface 5318 is formed at one side, far away from the fixed circular plate 521, of each arc-shaped polishing strip 531, and the arc-shaped polishing surface 5318 abuts against the joint of the tapered annular portion 20 and the cylindrical portion 10. The grinding shell 50 is rotated by the rotation motor 40, and then the peripheral surface of the tapered annular portion 20 can be ground by the grinding ring 522, and the cambered grinding ring 53 grinds the junction of the tapered annular portion 20 and the cylindrical portion 10, so that the tapered annular portion 20 and the cylindrical portion 10 are smoothly connected.
For example, when grinding, the axis of the cylindrical piston 100 is arranged in the vertical direction, and since the fixed circular plate 521 is provided with the plurality of flutes 5215, when grinding the peripheral surface of the tapered annular portion 20, the ground particles can fall down and be discharged through the flutes 5215, so as not to affect the subsequent grinding accuracy. And the chip discharging gaps 5315 on the cambered grinding ring 53 can lead out and drop the chips at the joint of the tapered annular part 20 and the cylindrical part 10. For example, the push air pump 60 is disposed at the bottom of the ventilation pipe 51, and the push air pump 60 is provided with a telescopic air outlet pipe (not shown), the ventilation pipe 51 is movably sleeved on the telescopic air outlet pipe, and the telescopic air outlet pipe is used for pumping air into the ventilation pipe 51, so that high-pressure air enters the mating end 513 and is ejected from the plurality of air outlet holes 514 on the mating end 513, so as to blow away the particles.
For example, a metal piston 54 is slidably disposed in the vent pipe 51, a positioning ring 55 is disposed in the vent pipe 51, the metal piston 54 is supported on the positioning ring 55, a pushing piece 545 is disposed in the middle of the metal piston 54, a plurality of blowing holes 548 are formed through the metal piston 54, the diameter of the blowing holes 548 is smaller than that of the air outlet holes 514, a through hole 5319 is formed through the matching groove 5135, the through hole 5319 is communicated with the air channel 511, the distance between the bottom surface of the matching groove 5135 and the air outlet holes 514 is smaller than the thickness of the metal piston 54, so that when the metal piston 54 abuts against the bottom surface of the air channel 511, the plurality of air outlet holes 514 can be sealed by the circumferential surface of the metal piston 54, a guide rod 48 is convexly disposed at the end of the output shaft 43 of the rotating motor 40, and the guide rod 48 is disposed in the through hole 5319, and serves to push against the metal piston 54.
For example, during grinding, the push air pump 60 inflates the breather pipe 51 through the telescopic outlet pipe, air is blown out from the plurality of air blowing holes 548 of the metal piston 54 and is blown out through the plurality of air outlet holes 514, the end portion of the tapered annular portion 20 is blown clean by the air, and the air flows out from between the outer circumferential surface of the tapered annular portion 20 and the inner circumferential surface of the grinding ring 522, so that the inside and outside of the tapered annular portion 20 are blown clean. Thereafter, the pushing air pump 60 is powered up again to blow the metal piston 54 off the positioning ring 55 and rise rapidly until the metal piston 54 closes the plurality of air blowing holes 548, at this time, the stress on the metal piston 54 is greater, so that the rising speed thereof is increased, at this time, the metal piston 54 can be used to push the polishing casing 50 to rise sharply and be sleeved on the tapered annular portion 20, at the same time, the rotating motor 40 drives the rotating shaft to rotate, and the output shaft 43 is screwed into the coupling end 513, during the screwing process, the air pipe 51 continues to move towards the rotating motor 40, the guide rod 48 pushes the metal piston 54 away from the coupling end 513, and when the air vent is fully screwed onto the output shaft 43, the guide rod 48 pushes the metal piston 54 back and exposes the plurality of air outlet holes 514, at this time, the plurality of blow holes 548 in the metal piston 54 are again in communication with the plurality of exhaust holes 514. Thereafter, the air pipe 51 is not rotated in the circumferential direction because it is fixed to the output shaft 43 and is not lifted in the axial direction, but the air pipe 51 is rotated by the rotating motor 40 to drive the grinding housing 50 to grind, and the air in the push air pump 60 is discharged through the plurality of air blowing holes 548 and the plurality of air outlet holes 514 and is discharged from the plurality of chip grooves 5215.
Referring to fig. 7, the step of polishing the cylindrical piston 100 by the polishing mechanism 30 includes:
in step S106, the rotating electrical machine 40 is positioned in the tapered annular portion 20, and the cylindrical piston 100 is fixed to the housing 41 of the push air pump 60 in a snap-fit manner, so that the polishing housing 50 abuts against the bottom of the cylindrical piston 100 and is located on the push air pump 60;
in step S107, the push air pump 60 pushes the metal piston 54 to ascend by high pressure air so as to utilize the metal piston 54 to close the plurality of air outlet holes 514 on the air vent pipe 51, so as to force the metal piston 54 to drive the air vent pipe 51 to ascend at an accelerated speed;
in step S108, the rotating electrical machine 40 drives the output shaft 43 to rotate in a matching manner, so that the output shaft 43 is screwed and fixed on the mating end 513 of the vent pipe 51;
in step S109, during the process that the output shaft 43 is screwed to the mating end 513, the guide rod 48 pushes the metal piston 54 away from the mating end 513 until the metal piston 54 exposes the plurality of air outlet holes 514;
in step S110, the rotary motor 40 drives the polishing housing 50 to rotate through the output shaft 43, so that the polishing ring 522 polishes the peripheral surface of the tapered annular portion 20, and the cambered polishing ring 53 polishes the joint between the tapered annular portion 20 and the cylindrical portion 10.
Through adopting promote the air pump 60 and the cover shell 50 of polishing can conveniently realize polishing the cover shell 50 rise and with the connection of rotating electrical machines 40, and make polishing the cover shell 50 cover locate on the cylindric piston 100, utilize promptly promote the air pump 60 and promote metal piston 54 drives polishing the cover shell 50 cover is located on the cylindric piston 100, and promote the air pump 60 and can also provide gas in order to blow away the grain bits, be convenient for then improve the precision of polishing. When it is desired to remove the sanding cartridge 50, the vent tube 51 may be removed from the rotary motor 40 by rotating the vent tube 51.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. A method for forming a piston of a rubber air spring is characterized by comprising the following steps:
stamping a metal plate to form a cylindrical part, wherein one end of the cylindrical part is convexly provided with an operation convex part, and the end of the cylindrical part, which is far away from the operation convex part, is an opening end;
turning over the cylindrical portion so that the open end faces a first mold, the first mold having a first cavity formed therein, the first cavity having a diameter that gradually decreases in a direction away from the cylindrical portion;
driving the cylindrical part to move towards the first die, wherein the periphery of the cylindrical part is pressed against the peripheral surface of the first cavity so as to force the periphery of the cylindrical part to be bent and deformed inwards;
driving the cylindrical part to move towards a shaping mold, wherein a shaping cavity is formed in the shaping mold, the diameter of the shaping cavity is gradually reduced along the direction far away from the cylindrical part, and the maximum diameter of the shaping cavity is smaller than that of the first cavity; the periphery of the cylindrical part is pressed against the peripheral surface of the shaping cavity, so that the periphery of the cylindrical part is forced to be bent inwards again to deform, and a cylindrical piston is formed;
the cylindrical piston includes a cylindrical portion and a tapered annular portion formed at one end of the cylindrical portion, the cylindrical portion having a diameter larger than that of the tapered annular portion;
polishing the cylindrical piston by using a polishing mechanism, wherein the polishing mechanism comprises a rotating motor, a polishing casing and a pushing air pump, the rotating motor is arranged in the tapered annular part, the rotating motor comprises a shell, a driving structure, a driving main body and an output shaft, the shell is arranged in the tapered annular part, arc-shaped positioning blocks are respectively arranged on two opposite sides of the shell, and the two arc-shaped positioning blocks can stretch and retract along the radial direction of the shell;
the driving structure is arranged in the shell and connected with the two arc-shaped positioning blocks and used for driving the two arc-shaped positioning blocks to extend so as to force the arc-shaped surfaces of the arc-shaped positioning blocks to tightly abut against the inner surface of the gradually-reduced annular part to position the rotating motor, the driving main body is arranged in the shell, and the output shaft is connected with the driving main body and coaxially arranged with the gradually-reduced annular part;
the end part of the output shaft protrudes out of the tapered annular part, external threads are formed on the peripheral surface of the end part of the output shaft, the polishing sleeve shell is screwed on the end part of the output shaft and sleeved on the tapered annular part, and the polishing sleeve shell is driven by the rotating motor to rotate so as to polish the surface of the tapered annular part.
2. The method for molding a piston of a rubber air spring according to claim 1, wherein: the diameter of the cylindrical portion is 1.5 to 2 times the diameter of the tapered annular portion.
3. The method for molding a piston of a rubber air spring according to claim 1, wherein: after the step of forming the barrel piston, further comprising the steps of: and welding a metal retainer ring at one end of the cylindrical part, which is far away from the operation convex part.
4. The method of claim 3, wherein: the welding mode is spot welding, and the outer diameter of the metal retainer ring is equal to that of the cylindrical part.
5. The method of claim 3, wherein: the method also comprises the following steps after the step of welding the metal retainer ring: a metal reinforcing ring is pressed into the tapered annular portion.
6. The method for molding a piston of a rubber air spring according to claim 1, wherein: the length of the tapered annular portion is greater than that of the cylindrical portion, and the tapered annular portion is smoothly connected with the cylindrical portion.
7. The method for molding a piston of a rubber air spring according to claim 1, wherein: the operation convex part is round platform form, the periphery of operation convex part is formed with the card and establishes the face and is equipped with the ring channel in a concave way, the card establishes the face and is located one side of ring channel.
8. The method for molding a piston of a rubber air spring according to claim 1, wherein: the method further comprises, before the step of driving the cylindrical portion towards the sizing die, the steps of:
driving the cylindrical part to move towards a second mould, wherein a second cavity is formed in the second mould, the diameter of the second cavity is gradually reduced along the direction far away from the cylindrical part, and the maximum diameter of the second cavity is smaller than that of the first cavity; the maximum diameter of the second cavity is larger than that of the shaping cavity, and the periphery of the cylindrical part is pressed against the peripheral surface of the second cavity to force the periphery of the cylindrical part to bend inwards and deform.
9. The method for molding a piston of a rubber air spring according to claim 8, wherein: the method further comprises, before the step of driving the cylindrical portion towards the sizing die, the steps of:
driving the cylindrical part to move towards a third mould, wherein a third cavity is formed in the third mould, the diameter of the third cavity is gradually reduced along the direction far away from the cylindrical part, and the maximum diameter of the third cavity is smaller than that of the second cavity; the maximum diameter of the third cavity is larger than that of the shaping cavity, and the periphery of the cylindrical part is pressed against the peripheral surface of the third cavity to force the periphery of the cylindrical part to bend inwards and deform.
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| CN1103145A (en) * | 1993-09-29 | 1995-05-31 | 固特异轮胎和橡胶公司 | Airspring piston and airspring assembly |
| CN201096162Y (en) * | 2007-10-22 | 2008-08-06 | 宁波美亚达汽车部件制造有限公司 | Rubber air spring for cars |
| CN102245926A (en) * | 2008-12-11 | 2011-11-16 | 康蒂泰克空气弹簧系统有限公司 | Air spring |
| CN102672044A (en) * | 2011-03-05 | 2012-09-19 | 江苏勇龙电气有限公司 | Opening closing mould of pressure equalizing barrel |
| CN103883659A (en) * | 2014-03-03 | 2014-06-25 | 江苏大学 | Air spring with shape-variable piston base and control method of air spring |
| CN108176956A (en) * | 2016-12-08 | 2018-06-19 | 慈溪市龙山汽配有限公司 | A kind of piston machining process |
| CN207945228U (en) * | 2017-11-02 | 2018-10-09 | 广东溢康通空气弹簧有限公司 | A kind of air-spring piston structure |
| CN108941320A (en) * | 2017-05-19 | 2018-12-07 | 张�杰 | A kind of processing method of 250 flange piston bucket |
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2019
- 2019-03-26 CN CN201910232092.9A patent/CN109909695B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103145A (en) * | 1993-09-29 | 1995-05-31 | 固特异轮胎和橡胶公司 | Airspring piston and airspring assembly |
| CN201096162Y (en) * | 2007-10-22 | 2008-08-06 | 宁波美亚达汽车部件制造有限公司 | Rubber air spring for cars |
| CN102245926A (en) * | 2008-12-11 | 2011-11-16 | 康蒂泰克空气弹簧系统有限公司 | Air spring |
| CN102672044A (en) * | 2011-03-05 | 2012-09-19 | 江苏勇龙电气有限公司 | Opening closing mould of pressure equalizing barrel |
| CN103883659A (en) * | 2014-03-03 | 2014-06-25 | 江苏大学 | Air spring with shape-variable piston base and control method of air spring |
| CN108176956A (en) * | 2016-12-08 | 2018-06-19 | 慈溪市龙山汽配有限公司 | A kind of piston machining process |
| CN108941320A (en) * | 2017-05-19 | 2018-12-07 | 张�杰 | A kind of processing method of 250 flange piston bucket |
| CN207945228U (en) * | 2017-11-02 | 2018-10-09 | 广东溢康通空气弹簧有限公司 | A kind of air-spring piston structure |
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| CN109909695A (en) | 2019-06-21 |
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