CN201434036Y

CN201434036Y - Nitrogen spring for stamping mold

Info

Publication number: CN201434036Y
Application number: CN2009200396696U
Authority: CN
Inventors: 吕建明
Original assignee: ZHENJIANG ZHENDONG ELECTROLUMINESCENCE CO Ltd
Current assignee: ZHENJIANG ZHENDONG ELECTROLUMINESCENCE CO Ltd
Priority date: 2009-04-16
Filing date: 2009-04-16
Publication date: 2010-03-31
Anticipated expiration: 2019-04-16

Abstract

The utility model discloses a nitrogen spring for a stamping mold, which comprises a plunger piston, a cylinder body, a cylinder cover and an air inlet device, wherein the cylinder cover is fixed on the upper end of the cylinder body through a fixed connection piece, a gasket-type seal mechanism is arranged between the outer circumferential surface of the cylinder cover and the inner circumferential surface of the cylinder body, the air inlet device is arranged on the bottom part of the cylinder body, a movable seal mechanism and a guide ring are arranged at the position on which the outer circumferential surface of the plunger piston is matched with the cylinder cover, the guide ring is fixed inside the cylinder cover, the plunger piston is in clearance fit with the inner ring surface ofthe guide ring, and the quantity of the plunger piston is multiple, so the elastic force which is born by each plunger piston is reduced from the original 18 MPa to 4 to 5 MPa, so the born elastic pressure of each plunger piston is greatly reduced, and the service life is prolonged; and the application safety of the nitrogen spring is improved.

Description

A kind of stamping die nitrogen spring

Technical field

The utility model relates to a kind of nitrogen spring, and the nitrogen spring that particularly a kind of stamping die is used belongs to the technical field of elastic element.

Background technique

Along with the continuous development of science and technology, industrial field is more and more higher to the requirement of elastic element, has both required elastic element to satisfy the various needs of Machine Design, the raising that requires the performance of elastic element to bring quality of product again.Stamping die uses traditional elastic element-spring, rubber, air cushion etc. always, but spring, rubber, air cushion all exist certain defective in the use of mould, the elastic force that is produced in use as spring, rubber is that the increase along with decrement is directly proportional and increases, can not keep constant compression force in the course of the work, thereby cause product processed wrinkling or break, influence the quality of product and the up-to-standard rate of product, improved cost of production, and want first pretension when using, therefore use cumbersome; Air cushion and for example, though air cushion can remedy the shortcoming of spring rubber, when adopting the press machine air cushion, Mould design, adjustment, use inconvenience, and the power that air cushion provides is also inaccurate, takies bigger space again.

In order to solve this technical problem, adopt nitrogen spring to use recently as elastic element.Nitrogen spring is the parts with high elasticity function that utilize the compressibility principle of nitrogen to design, it with high-pressure inert gas-nitrogen-sealed in the container of determining, external force is compressed nitrogen by plunger, expansion by high pressure nitrogen obtains powerful pressure, compare with other elastic element, it is constant, simple in structure that nitrogen spring has elastic force pressure, and because nitrogen is a kind of nontoxic, no burn into non-inflammable gas, therefore safe in utilization, reliable.Because nitrogen spring has above-mentioned advantage, so nitrogen spring is widely used in die industry.In mould, use nitrogen spring can dwindle the mould volume, shorten manufacturing time, reduce the die trial number of times and improve success rate, prolong die life, can significantly improve the quality of products and yield rate, very high economic benefit is arranged.

The press tool nitrogen spring of prior art, comprise plunger, cylinder body, cylinder cap, air inlet system, a plurality of nitrogen springs generally are set in mould, in order to ensure each nitrogen spring enough elastic force is arranged, must keep the elevated pressures of 18Mpa, nitrogen spring damages easily, and the pressure of each spring is not easy to be consistent; Because the elastic force pressure that plunger bears is bigger, regulate inconvenience, plunger is damaged, thereby shortened the working life of nitrogen spring, and the nitrogen pressure that single plunger bears is bigger, has reduced the Security of nitrogen spring.

The model utility content

Technical problem to be solved in the utility model provides a kind of long service life, stamping die nitrogen spring simple in structure and safe in utilization, reliable.

In order to solve the problems of the technologies described above, a kind of stamping die nitrogen spring of the utility model, comprise plunger, cylinder body, cylinder cap, air inlet system, described cylinder cap is fixed on described cylinder body upper end by fixed connecting piece, between the outer circumferential face of described cylinder cap and the described cylinder body inner peripheral surface static seal mechanism is set, described air inlet system is arranged on the bottom of described cylinder body, the cooperation place of described plunger outer circumferential face and cylinder cap is equipped with motive sealing mechanism and guide ring, described guide ring is fixedly installed in the cylinder cap, described plunger and corresponding guide ring inner ring surface Spielpassung, wherein, described plunger is a plurality of, and described a plurality of plungers evenly are arranged on the described cylinder cap.

Adopt the stamping die nitrogen spring of said structure, because described cylinder body is provided with a plurality of plungers, the elastic force pressure that each plunger bears is reduced to 4-5Mpa by original 18Mpa, reduced the elastic force pressure that each plunger bears greatly, when regulating pressure, can be easy to coupled columns and fill in row and regulate and make the plunger unanimity, and the elastic force pressure that each plunger bears is less, be not easy damage, thereby prolonged the working life of nitrogen spring greatly; In addition, because the elastic force pressure that plunger bears is little, improved the Security that nitrogen spring uses during use; And the utility model has only increased plunger on the basis of original nitrogen spring, and is therefore simple in structure, with low cost, safe in utilization, reliable.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the sectional view of the utility model A-A

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

In order to solve the problems of the technologies described above, a kind of stamping die nitrogen spring of the utility model comprises a plurality of plungers 1, cylinder body 2, cylinder cap 21, air inlet system 3; Air inlet system 3 is installed in the bottom of described cylinder body 1, be used for nitrogen is charged in the cylinder body 2, cylinder cap 21 is fixedly installed on the top of cylinder body 2 by steel wire ring 11 or other modes, cylinder cap 21 outer circumferential faces and cylinder body 2 inner peripheral surfaces are sealed and matched, each plunger 1 periphery is provided with a motive sealing mechanism and guide ring 13, stuffing box gland 121 is enclosed within corresponding plunger 1 periphery, be positioned at the upper end of cylinder body 2, static seal mechanism is arranged between the outer circumferential face and described cylinder body 2 inner peripheral surfaces of described cylinder cap 21, and motive sealing mechanism and guide ring 13 are arranged on 21 cooperation places of described plunger 1 outer circumferential face and cylinder cap; Motive sealing mechanism is a Y grommet type seal 121, Y grommet type seal 121 is enclosed within outside the corresponding plunger 1, be embedded in the groove of cylinder cap 21 inboards, static seal mechanism is made up of O type static seal circle 122 and baffle plate 123, be embedded in the groove in cylinder cap 21 outsides, thereby hermetic unit and guide ring 13 are fixed in the described cylinder cap, play a part cylinder cap 21 and cylinder body 2 sealings, corresponding guide ring 13 is enclosed within corresponding plunger 1 periphery, the endoporus of guide ring 13 and plunger 1 Spielpassung, the external diameter of guide ring 13 and cylinder cap 21 interference fit; One end of plunger 1 is mobilizable to be arranged in the described cylinder cap 21, and the other end stretches out cylinder body 2; In the groove of arranging with motive sealing mechanism that is embedded in plunger seal sheath 11 inboards, when plunger 1 slided in cylinder body 2, guide ring 13 played a part guiding, made plunger 1 be not easy to be damaged.In the present embodiment, adopt a plurality of plungers 1 can improve the elastic force of plunger, reduced the elastic force pressure that each plunger 1 bears greatly, when regulating pressure, can be easy to plunger 1 is regulated, make the plunger unanimity, and the elastic force pressure that each plunger 1 bears is less, be not easy damage, thereby prolonged the working life of nitrogen spring greatly.

In sum, the utility model is compared with existing nitrogen spring, has advantage simple in structure, durable, with low cost, safe in utilization, reliable.

Here description of the present utility model and application are illustrative; be not to want in the above-described embodiments with scope restriction of the present utility model; therefore, the utility model is not subjected to the restriction of present embodiment, and the technological scheme that any employing equivalence replacement obtains is all in the scope of the utility model protection.

Claims

1, a kind of stamping die nitrogen spring, comprise plunger (1), cylinder body (2), cylinder cap (21), air inlet system (3), described cylinder cap (21) is fixed on described cylinder body (2) upper end by fixed connecting piece, between the outer circumferential face of described cylinder cap (21) and described cylinder body (2) inner peripheral surface static seal mechanism is set, described air inlet system (3) is arranged on the bottom of described cylinder body (2), (21) cooperation place of described plunger (1) outer circumferential face and cylinder cap is equipped with motive sealing mechanism and guide ring (13), described guide ring (13) is fixedly installed in the cylinder cap (21), described plunger (1) and corresponding guide ring (13) inner ring surface Spielpassung, it is characterized in that, described plunger (1) is a plurality of, and described a plurality of plungers (1) evenly are arranged in the described cylinder cap (21).