CN205446689U

CN205446689U - Piston rod

Info

Publication number: CN205446689U
Application number: CN201521098928.4U
Authority: CN
Inventors: 李延波; 李广亮; 周玉乾; 胡相捧; 王君烨; 彭育东; 李洋; 魏延峰
Original assignee: Pingdingshan Pmj Coal Mine Machinery Equipment Co Ltd
Current assignee: Pingdingshan Pmj Coal Mine Machinery Equipment Co Ltd
Priority date: 2015-12-19
Filing date: 2015-12-19
Publication date: 2016-08-10
Anticipated expiration: 2025-12-19

Abstract

The utility model discloses a piston rod relates to the piston rod aseptic technic, can increase piston rod life. Piston rod includes piston rod base member and stainless steel barrel cover, and the piston rod base member is lived in the inseparable cladding of stainless steel barrel cover. The utility model is suitable for a piston rod is anticorrosive.

Description

A kind of piston rod

Technical field

This utility model relates to the aseptic technic of a kind of piston, particularly relates to the aseptic technic of a kind of piston rod.

Background technology

In order to improve wearability and the anti-corrosion of piston rod, current domestic traditional handicraft is plating hard chromium on surface (thickness of coating 0.02～0.05mm) and polishes.But along with the use chromium coating of piston rod can slowly lose efficacy, inevitably there is space and crackle in chromium coating, piston rod matrix runs into the media such as the moisture in wet weather i.e. can pass through layers of chrome space, it is seeped into base metal surface, make chromium, one micro cell of ferroelectricity pair production, chromium, ferrum actual potential during ferroelectricity is even is lower than chromium, form electrochemical corrosion, occur the most first to corrode the parent metal below chromium coating during electrochemical corrosion, time slight can outside surface observation to rusty stain, serious then there will be rust hole, even can be along the lateral expansion of parent metal, the layers of chrome at surface defect is caused to peel off.

Chromium plating is serious to people, environmental pollution, and additionally chromium plating uneven coating is even, and porosity is high, easy peeling, and chromium plating expense is the highest, it is impossible to meet the needs on producing, and therefore uses suitable economic method to replace chromium plating and is always the important topic of construction machinery industry.

Summary of the invention

In view of this, this utility model provides a kind of piston rod, it is possible to effectively reduce piston rod corruption rust, increases piston rod service life.

On the one hand, this utility model embodiment provides a kind of piston rod, including:

Piston rod matrix, is closely coated with rustless steel jacket casing outside described piston rod matrix.

Alternatively, piston rod matrix is a cylinder, and outside piston rod matrix, the wall thickness of the rustless steel jacket casing of cladding is 0.6-1.0mm.

Alternatively, rustless steel jacket casing is cut out and is rolled into tubular after-drawing by the stainless-steel sheet that thickness is 0.8-1.2mm and is made.

Alternatively, the abutment joint of described rustless steel jacket casing uses and welds together from appearance welding method.

Alternatively, the annulus of described rustless steel jacket casing two ends cladding piston rod base end uses self-melting and welding method to weld together.

Compared with prior art, this utility model is by being coated with one layer of corrosion resistant plate outside piston rod matrix so that piston rod has possessed stainless characteristic.Rustless steel resistance to chemical attack and electrochemical corrosion performance are best inside steel, are only second to titanium alloy, the most resistance to ultralow temperature heat-resisting, high temperature resistant, the most low temperature resistant, intensity is high, thus the probability that thin plate uses is greatly, room temperature is processed, i.e. easily plastic working, need not process on surface, safeguard simple, cleaning, highly polished, good welding performance, based on stainless plurality of advantages, it uses in industrial products in a large number.This utility model one piston rod possesses all advantages of rustless steel, and corrosion resistance is strong, wear-resisting, adds the service life of piston rod.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of embodiment piston rod of the present utility model；

Fig. 2 is the cross sectional representation of embodiment piston rod of the present utility model；

Fig. 3 is embodiment stainless steel cylinder nested structure schematic diagram of the present utility model.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model embodiment one piston rod is described in detail.

It will be appreciated that described embodiment be only this utility model a part of embodiment rather than whole embodiments.Based on the embodiment in this utility model, all other embodiments that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.

Referring to Fig. 1 and Fig. 3, this utility model one piston rod embodiment, including piston rod matrix 1, being closely coated with rustless steel jacket casing 2 outside described piston rod matrix, one end of piston rod matrix 1 connects hanger 5, and the other end connects piston crown 6.

As an alternative embodiment, described piston rod matrix 1 is a cylinder, and outside piston rod matrix, the wall thickness of the rustless steel jacket casing 2 of cladding is 0.6-1.0mm.The stainless-steel sheet of this thickness has higher toughness and surface rigidity concurrently, it is easy to machine-shaping, can effectively reduce the generation of rosin joint solder skip during welding.

Referring to Fig. 3, as an alternative embodiment, described rustless steel jacket casing is cut out by the stainless-steel sheet that thickness is 0.8-1.2mm and is rolled into tubular after-drawing by rotary machine and is made, rustless steel jacket casing abutment joint 4 uses self-melting and welding method to weld together, and meets the roughness requirements of rustless steel jacket casing after polishing.

Utilize the pliability of corrosion resistant plate, by circular diameter in stretching uniform shrinkage stainless steel cylinder, increase inner round wall and the coefficient of friction of piston rod matrix so that it is the cladding power of piston rod matrix is strengthened.

Referring to Fig. 2, in this utility model, the annulus 3 of rustless steel jacket casing two ends cladding piston rod base end uses self-melting and welding method to weld together, and not only possesses aesthetic property but also possess the fastness strengthening rustless steel jacket casing cladding piston rod matrix after polishing.

Preferably, the piston rod of described rustless steel jacket casing cladding, can use rolling processing process that the butt weld of rustless steel jacket casing is flattened, after so processing, be substantially not visible described weld seam, after rolling, the accuracy to size of rustless steel jacket casing does not changes.

This utility model embodiment also provides for a kind of piston rod manufacture method, including step:

S11, cut out stainless-steel sheet；

S12, stainless-steel sheet being rolled into tubular, butt welding is sewn into rustless steel jacket casing；

S13, rustless steel jacket casing is enclosed within outside piston rod matrix；

S14, by stretching rustless steel jacket casing make it be coated on piston rod matrix；

S15, car fall the part that stainless steel cylinder two ends are extended；

S16, the annulus forming rustless steel jacket casing cladding piston rod matrix two ends weld, and make the piston rod of rustless steel jacket casing cladding；

S17, the piston rod being coated with described rustless steel jacket casing is carried out stress-removal heat treatment；

S18, the piston rod being coated with described rustless steel jacket casing is processed by shot blasting.

As an alternative embodiment, the thickness that selects of described stainless-steel sheet is the stainless-steel sheet of 0.8-1.2mm, and stainless-steel sheet is cut out a size of: length is more than or equal to piston rod length thereof, and width is more than piston rod matrix perimeter of section 3-5mm.The stainless-steel sheet of this thickness has higher toughness and surface rigidity concurrently, it is easy to machine-shaping, can effectively reduce the generation of rosin joint solder skip during welding.

Referring to Fig. 1 and Fig. 3, as an alternative embodiment, described stainless-steel sheet is rolled into tubular, butt welding is sewn into rustless steel jacket casing, including: by rotary machine, stainless-steel sheet is rolled into tubular, butt welding seam 4 makes rustless steel jacket casing 2, and in rustless steel jacket casing 2, Circularhole diameter is than the piston rod matrix 1 big 0.13-0.17mm of diameter of section, facilitates jacket casing easily to entangle piston rod matrix.

As an alternative embodiment, before described rustless steel jacket casing 2 is enclosed within piston rod matrix, it is placed in metal heating furnace and is heated to 200 degrees Celsius, because rustless steel has the characteristic expanded with heat and contract with cold, so rustless steel sleeve inner circle diameter now can expand further.After rustless steel jacket casing is heated to 200 degrees Celsius, its pliability increases further, it is easier to processing, it is often more important that can shrink after cooling, strengthens its cladding compactness.

When rustless steel jacket casing is heated to 200 degrees Celsius by the characteristic utilizing stainless plasticity, ductility and thermal expansion, it is enclosed within piston rod matrix and is stretched to closely be coated with piston rod matrix, utilize stainless shrinkage characteristic, after the cooling of rustless steel jacket casing, be coated with piston rod matrix more closely.The operating temperature of piston rod is typically below 90 degrees Celsius, thereby, it is ensured that rustless steel jacket casing will not loosen or come off during piston rod work, it is ensured that the reliability of piston rod work.

As an alternative embodiment, described by stretching rustless steel jacket casing make it be coated on piston rod matrix, including: the rustless steel jacket casing 2 after heating is enclosed within outside piston rod matrix 1, because being heated, now the ductility of rustless steel jacket casing is more preferable, rustless steel jacket casing 2 Uniform Tension is made by stretching device, rustless steel jacket casing inner circle diameter can uniformly reduce, until stainless steel cylinder set is closely coated on piston rod matrix 1, it is placed at indoor cool place, because of the characteristic of shrinkage after natural cooling, stainless steel cylinder set reduces interior circular diameter further, can reach complete, closely, seamless envelopes piston rod matrix, re-use process equipment car and fall the part that rustless steel jacket casing 2 two ends are extended because of stretching.

Utilize the pliability of corrosion resistant plate, can circular diameter in uniform shrinkage stainless steel cylinder by stretching stainless steel cylinder, increase inner round wall and the coefficient of friction of piston rod matrix, make it that cladding power of piston rod matrix to be strengthened, adding the characteristic of rustless steel shrinkage, rustless steel jacket casing is higher to the cladding power of piston rod matrix.

As an alternative embodiment, described car falls the part that stainless steel cylinder two ends are extended, including: after car falls the part that rustless steel jacket casing 2 two ends are extended because of stretching, it can be seen that rustless steel jacket casing 2 is coated with piston rod matrix 1 two ends the annulus 3 of handing-over, along the annulus 3 at two ends from fusion welding annulus, rustless steel jacket casing and piston rod matrix become an entirety, make the piston rod semi-finished product of rustless steel jacket casing cladding.

Preferably, the piston rod of described rustless steel jacket casing cladding, rolling processing process can be used the butt weld of rustless steel jacket casing can be flattened, after so processing, be substantially not visible described weld seam, after rolling, the accuracy to size of rustless steel jacket casing does not changes.

As an alternative embodiment, the piston rod being coated with described rustless steel jacket casing is carried out semi-finished product and carries out stress-removal heat treatment.

As an alternative embodiment, the described piston rod to being coated with rustless steel jacket casing is processed by shot blasting, including: after completing stress-removal heat treatment, polishing stainless steel jacket casing, make the roughness of described rustless steel jacket casing meet and use requirement.

The above; it is only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with scope of the claims.

Claims

1. a piston rod, it is characterised in that including: piston rod matrix, is coated with rustless steel jacket casing outside described piston rod matrix.

Piston rod the most according to claim 1, it is characterised in that piston rod matrix is a cylinder, outside piston rod matrix, the wall thickness of the rustless steel jacket casing of cladding is 0.6-1.0mm.

Piston rod the most according to claim 1, it is characterised in that described rustless steel jacket casing is cut out and is rolled into tubular after-drawing by the stainless-steel sheet that thickness is 0.8-1.2mm and is made.

Piston rod the most according to claim 1, it is characterised in that the abutment joint of described rustless steel jacket casing uses and welds together from appearance welding method.

Piston rod the most according to claim 1, it is characterised in that the annulus of described rustless steel jacket casing two ends cladding piston rod base end uses self-melting and welding method to weld together.