CN204267424U

CN204267424U - The oil cylinder piston that cylinder barrel weares and teares can be prevented

Info

Publication number: CN204267424U
Application number: CN201420679963.4U
Authority: CN
Inventors: 汪立平; 邱永宁; 袁飞
Original assignee: Jiangsu Hengli High Pressure Oil Cylinder Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2014-11-13
Filing date: 2014-11-13
Publication date: 2015-04-15
Anticipated expiration: 2024-11-13

Abstract

The utility model discloses a kind of oil cylinder piston preventing cylinder barrel from wearing and tearing, comprise piston only, piston only periphery has the dark groove of mounting hole seal ring, dark groove both sides are respectively equipped with the shallow grooves of installing guide ring, the piston only outer circumferential face between described dark groove and shallow grooves is piled and is welded with layer of brass.The utility model is by built-up welding layer of brass mode on piston only outer circumferential face, piston only is made both to have had good sliding, there is again certain intensity of bearing fluid high pressure and cylinder cap impact force, when softer layer of brass contacts with inner wall of cylinder surface sliding simultaneously, can effectively prevent pulling inner wall of cylinder surface, extend the working life of oil cylinder.

Description

The oil cylinder piston that cylinder barrel weares and teares can be prevented

Technical field

The utility model relates to a kind of oil cylinder piston preventing cylinder barrel from wearing and tearing.

Background technique

In the working procedure of whole hydraulic jack, piston is major part hydraulic energy being transferred to mechanical energy, piston assembly is reciprocating along cylinder barrel under hydraulic oil effect, there is friction law with inner wall of cylinder surface simultaneously, this requires that piston itself should have good sliding capability, cylinder barrel surface can not be damaged during work, hardness can not be too large, but in order to the impact force of the high pressure and cylinder cap of bearing fluid, certain intensity must be had again, therefore, just require the existing good sliding capability of piston, there is again certain intensity.

Model utility content

The technical problems to be solved in the utility model is: overcome the deficiency in prior art, provides a kind of oil cylinder piston with the prevented cylinder barrel wearing and tearing of good sliding capability and some strength.

The utility model solves the technological scheme that its technical problem adopts: a kind of oil cylinder piston preventing cylinder barrel from wearing and tearing, comprise piston only, piston only periphery has the dark groove of mounting hole seal ring, dark groove both sides are respectively equipped with the shallow grooves of installing guide ring, the piston only outer circumferential face between described dark groove and shallow grooves is piled and is welded with layer of brass.

Specifically, described layer of brass thickness is 2 ~ 4mm.

The beneficial effects of the utility model are: the utility model is by built-up welding layer of brass mode on piston only outer circumferential face, piston only is made both to have had good sliding, there is again certain intensity of bearing fluid high pressure and cylinder cap impact force, when softer layer of brass contacts with inner wall of cylinder surface sliding simultaneously, can effectively prevent pulling inner wall of cylinder surface, extend the working life of oil cylinder.

Accompanying drawing explanation

Below in conjunction with drawings and embodiments, the utility model is further illustrated.

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

Dark groove 3. shallow grooves 4. layer of brass of 1. piston onlies 2. in figure

Embodiment

By reference to the accompanying drawings the utility model is further described now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present utility model in a schematic way, and therefore it only shows the formation relevant with the utility model.

A kind of oil cylinder piston preventing cylinder barrel from wearing and tearing as shown in Figure 1, comprise piston only 1, piston only 1 periphery has the dark groove 2 of mounting hole seal ring, dark groove 2 both sides are respectively equipped with the shallow grooves 3 of installing guide ring, piston only 1 outer circumferential face between described dark groove 2 and shallow grooves 3 is piled and is welded with layer of brass 4, the thickness of described layer of brass 4 is 2mm.

The thickness requirement of layer of brass 4 reaches best, and uniformity, and the consumption of too thick then copper material is large, too thin, easily weares and teares.Because the mother metal of piston only 1 is 45# steel, subject matter during built-up welding has: first base metals carbon equivalent is higher, and during built-up welding, the linear expansion coeffcient of brass is comparatively large, and the welding stress in deposited metal is large, easily cracks and occur the phenomenon of overlaying layer stripping; Secondly during built-up welding, the thermal conductivity of brass is comparatively large, and its fusing point also has larger difference with mother metal, also result in certain difficulty to built-up welding.Therefore, have selected the oxy-acetylene overlaying method that rate of dilution is less, the layer of brass 4 of heap postwelding is not almost diluted by mother metal, and thus surfacing layer quality is fine.

Welds prepares:

1, the preparation of primary coil before built-up welding;

The oxide of workpiece surface can hinder soaking of liquid brass, but the too light do not ground before workpiece built-up welding, because the joint capacity between deposited metal and primary coil may be worsened in too smooth surface.

2, the preparation of welding wire:

Select ERCuA1-A, diameter is the welding wire of φ 1.2mm.

3, substrate preheating: be preheated to 100 ~ 150 DEG C

Overlay-operation technology:

1, surfacing of Cu on 45#, adopt advanced MIG welding method, rational welding conditions, ensure that surfacing quality, improve manufacturing efficiency.

2, before weldering, postwelding adopts preheating, after-baking, ensure that the fusion character of overlay cladding and body material and prevents the generation of crackle.

3, strict control thermal weld stress and interpass temperature (note: interpass temperature 100 ~ 250 DEG C), reduces built-up welding to the impact of body material and welding deformation as far as possible.

4, take continuous built-up welding, should try one's best in weld deposit process uninterrupted, keep interpass temperature, be conducive to like this improving built-up welding efficiency.

5, in welding process, strictly control surfacing quality, do not allowed crackle, pore and with the defects such as matrix lack of fusion, and ensure that overlay cladding thickness is not less than 2mm after being worked into pattern size.

6, overlay cladding slow cooling, cracks for preventing surfacing layer metal or peels off, and heap postwelding must carry out slow cooling, with the slow cooling of asbestos cloth parcel workpiece.

Postwelding checks:

Postwelding must be cleared up layer of brass 4 surface, checks outward appearance, do not find crackle, pore, and the face of weld of copper and steel fuses well, meets usage requirement after being machined into pattern given size.

The utility model is by built-up welding layer of brass 4 mode on piston only 1 outer circumferential face, piston only 1 is made both to have had good sliding, there is again certain intensity of bearing fluid high pressure and cylinder cap impact force, when softer layer of brass 4 contacts with inner wall of cylinder surface sliding simultaneously, can effectively prevent pulling inner wall of cylinder surface, extend the working life of oil cylinder.

Above-mentioned mode of execution is only for illustrating technical conceive of the present utility model and feature; its object is to person skilled in the art can be understood content of the present utility model and be implemented; protection domain of the present utility model can not be limited with this; all equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed in protection domain of the present utility model.

Claims

1. the oil cylinder piston that can prevent cylinder barrel from wearing and tearing, comprise piston only (1), piston only (1) periphery has the dark groove (2) of mounting hole seal ring, dark groove (2) both sides are respectively equipped with the shallow grooves (3) of installing guide ring, it is characterized in that: piston only (1) outer circumferential face between described dark groove (2) and shallow grooves (3) is piled and is welded with layer of brass (4).

2. the oil cylinder piston preventing cylinder barrel from wearing and tearing according to claim 1, is characterized in that: described layer of brass (4) thickness is 2 ~ 4mm.