CN110421317A - A method of the hydraulic cylinder service life is promoted using embedded stainless steel tube - Google Patents
A method of the hydraulic cylinder service life is promoted using embedded stainless steel tube Download PDFInfo
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- CN110421317A CN110421317A CN201910665747.1A CN201910665747A CN110421317A CN 110421317 A CN110421317 A CN 110421317A CN 201910665747 A CN201910665747 A CN 201910665747A CN 110421317 A CN110421317 A CN 110421317A
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- stainless steel
- hydraulic cylinder
- steel tube
- internal diameter
- cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Metal Extraction Processes (AREA)
Abstract
A method of the hydraulic cylinder service life being promoted using embedded stainless steel tube, it is therefore an objective to which cost is relatively low, can obviously increase oil cylinder corrosion resistance and service life；The present invention is first by lathe on hydraulic cylinder steel pipe to be repaired, turning outer diameter of steel pipes 5-8mm, as processing benchmark, to prepare in next step；Deep-hole boring hydraulic cylinder pipe diameter is to D+0.5mm, and wherein D is the hydraulic cylinder internal diameter that original image paper size requires；Being embedded in an outer diameter in hydraulic cylinder steel pipe is D and with a thickness of the stainless steel tube of 1.2mm；It reserving 2mm size on stainless steel tube at end chamfer down and welds stainless steel tube with stainless steel electrode, processing weld seam is mutually neat to internal diameter, in order to avoid influence cold-drawn；It is D-0.4mm that hydraulic cylinder, which is integrally cold drawing to internal diameter, machines away cylinder barrel bottom end cold-drawn geometrical extension, and weld stainless steel tube with stainless steel electrode；Honing internal diameter to drawing size requires, then carries out other corresponding mechanical process；Finally weld cylinder bottom and other attachmentes.
Description
Technical field
The present invention relates to hydraulic cylinder inner wall anti-corrosives, wear-proof technique, specifically using embedded stainless steel come in lift cylinder
Wall anticorrosion antiwear performance.
Background technique
Hydraulic support is important one of the mechanical facility of coal mining, and hydraulic cylinder is then the important component on hydraulic support
One of.Underground coal mine bad environments, the piston rod of hydraulic cylinder are easy accumulation slack coal, rock dirt etc. in moving back and forth the course of work
Hard particles if things go on like this cause the outer inside wall of cylinder to cause to scratch；It is also easy to infiltrate aqueous vapor, H in hydraulic oil2The corrosive mediums such as S, from
And hydraulic cylinder inner surface is caused to corrode；Piston rod increases oil cylinder bore wear by repeatedly reciprocating motion under high pressure
Greatly.The appearance of various problems influences sealing effect, ultimately causes lifting force decline, seriously affect hydraulic cylinder service life and
Supporting safety.The material of hydraulic cylinder is generally common alloy steel, and the performances such as anti-corrosion, wear-resisting are poor.Although promoting the use of at present
Inner wall sloppy heat copper alloy technology energy lift cylinder service life, but price is very expensive, and internal diameter is less than the cylinder of 200mm
Cylinder easily deforms, and is not suitable for using molten copper technology.Stainless steel has excellent wear, corrosion resistance, heat resistance and anti-oxidant
Property, using embedded stainless steel " replacement " oil cylinder inner wall material, it can not only promote the service life of hydraulic cylinder, and cost
80% or more can be reduced than molten copper technology.
Summary of the invention
Object of the present invention is to overcome the shortcomings of above-mentioned prior art, provide in a kind of inner wall for small-diameter hydraulic oil cylinder
Embedding stainless steel tube processing, cost is relatively low, can obviously increase oil cylinder corrosion resistance and the use of service life embeds stainless steel tube and promoted
The method in hydraulic cylinder service life.
The present invention, come " replacement " inner wall material, is reached by an embedded relatively thin stainless steel tube and increases oil cylinder service life
Effect, specific steps are as follows:
(1) first by lathe on hydraulic cylinder steel pipe to be repaired, turning outer diameter of steel pipes 5-8mm, as processing benchmark, in next step
It prepares；
(2) deep-hole boring hydraulic cylinder pipe diameter is to D+0.5mm, and wherein D is the hydraulic cylinder internal diameter that original image paper size requires；
(3) being embedded in an outer diameter in hydraulic cylinder steel pipe is D and with a thickness of the stainless steel tube of 1.2mm；It falls stainless steel tube upper end
2mm size is reserved at angle down and welds stainless steel tube with stainless steel electrode, processing weld seam is mutually neat to internal diameter, in order to avoid influence cold-drawn；
(4) it is D-0.4mm that hydraulic cylinder, which is integrally cold drawing to internal diameter, machines away cylinder barrel bottom end cold-drawn geometrical extension, and use stainless steel
Welding electrode lives stainless steel tube；
(5) honing internal diameter to drawing size requires, then carries out other corresponding mechanical process；It finally welds cylinder bottom and other is attached
Part.
The usually normal steel alloy of material of the hydraulic cylinder steel pipe, the performances such as anti-corrosion, wear-resisting are poor.Embedded stainless steel
The material of pipe is 304 or 316, and the performances such as anti-corrosion, wear-resisting are good.The stainless steel tube outer diameter and hydraulic cylinder steel cylinder internal diameter it
Between Assurance of Size interference fit, stainless steel tube is pressed by external force.
The inner wall corrosion problem that the method for the present invention is primarily suitable for the small-diameter hydraulic oil cylinder to internal diameter less than 200mm carries out
Repair process.Major advantage is that stainless steel is utilized with good wearability, corrosion resistance, heat resistance and inoxidizability, is increased
Hydraulic cylinder service life.80% or more can be reduced by melting copper technology cost relative to oil cylinder inner wall.Using stainless steel tube and oil
The cold pressing of cylinder substrate combines, and will not influence the performance of substrate itself.Cold pressing, which combines, belongs to physical bond, will not generate the pollution ring such as exhaust gas
Border belongs to green manufacturing.
Detailed description of the invention
Fig. 1 is the oil cylinder structure of hydraulic schematic diagram after the present invention repairs；
In figure: 1. hydraulic cylinder steel cylinders, 2. stainless steel tubes；D is cylinder body of hydraulic oil cylinder internal diameter, and R is cylinder body of hydraulic oil cylinder outer diameter, L
For cylinder body of hydraulic oil cylinder length, S is hydraulic cylinder screw thread mouth length.
Specific embodiment
Embodiment 1:
By taking stretching on model ZFY13000/24/40D type two column protected type caving roof coal hydraulic support is very heavy as an example, thousand are stretched
Jin using time length will leakage, liquid leakage, need to repair, reached using embedded stainless steel tube aperture requirement.Specifically repaired
Journey are as follows:
(1) the very heavy 1 outer diameter R of hydraulic cylinder steel cylinder that stretches to be repaired is φ 128mm, internal diameter D is φ 100mm, length L is
1055mm.First upper lathe, 1 outer diameter of turning hydraulic oil cylinder steel cylinder to φ 121mm, as processing benchmark, to prepare in next step.
(2) 1 internal diameter of deep-hole boring hydraulic cylinder steel cylinder is to φ 100.5mm, and after removing cylinder bottom, sawing length L is 955mm.
(3) selecting specification is outer diameter φ 100.5mm, with a thickness of 304 stainless steel tubes 2 of 1.2mm, length 908mm.It is stainless
Assurance of Size interference fit between 1 internal diameter of 2 outer diameter of steel pipe and hydraulic cylinder steel cylinder, is pressed into stainless steel tube 2 by external force；Away from
Stainless steel tube 2 is welded using stainless steel electrode at the 2mm of end face, it is concordant to 2 internal diameter of stainless steel tube that postwelding processes weld seam.
(4) cold drawing steel tube (hydraulic cylinder steel cylinder 1 and stainless steel tube 2) is to internal diameter to φ 99.6mm, by drawing size requirement
The part of bottom edge elongation is machined away, then welds bottom end stainless steel tube 2 using stainless steel electrode.
(5) 2 internal diameter of honing stainless steel tube reaches the requirement of drawing size to φ 99.7mm, then completes by drawing size requirement
Other machinings, finally weld cylinder bottom and other attachmentes.
After above method Repair gene, very heavy continue to use in ZFY13000/24/40D type two column protected type of stretching
On caving roof coal hydraulic support, using effect is preferable, does not occur any problem in 1 year.
Embodiment 2:
By taking stretching on model ZY16000/32/70D type two column protected type caving roof coal hydraulic support is very heavy as an example.It stretches very heavy
Using time length will leakage, liquid leakage, need to repair.It uses the repair process of embedded stainless steel are as follows:
(1) the very heavy 1 outer diameter R of hydraulic cylinder steel cylinder that stretches is φ 150mm, internal diameter D is φ 116mm, length L is 1255mm.First vehicle
Outer diameter of steel pipes is cut to φ 145mm, as benchmark, to prepare in next step.
(2) 1 internal diameter of deep-hole boring hydraulic cylinder steel cylinder is to φ 116.5mm, and after removing cylinder bottom, sawing length L is 1255mm.
(3) selecting specification is outer diameter φ 116.5mm, with a thickness of 1.2mm, the stainless steel tube 2 of model 316, and length is
1195mm.Assurance of Size interference fit between 1 internal diameter of 2 outer diameter of stainless steel tube and hydraulic cylinder steel cylinder, by external force stainless steel
Pipe 2 is pressed into, and welds stainless steel tube 2 using stainless steel electrode at away from end face 2mm, and postwelding processes weld seam to 2 internal diameter of stainless steel tube
Simultaneously.
(4) cold drawing steel tube is φ 114.5mm to internal diameter D, the part of bottom edge elongation is machined away by drawing size requirement, then
Bottom end stainless steel tube 2 is welded using stainless steel electrode.
(5) honing internal diameter to drawing size requires, then completes other machinings by drawing size requirement, finally welds cylinder bottom
And other attachmentes.
After being processed using the above method, very heavy continue to use in ZY16000/32/70D type two column protected type Sub-Level Caving of stretching
On hydraulic support, using effect is preferable, does not occur any problem again in nearly 1 year.
Claims (3)
1. a kind of method that the hydraulic cylinder service life is promoted using embedded stainless steel tube, it is characterized in that:
(1) first by lathe on hydraulic cylinder steel pipe to be repaired, turning outer diameter of steel pipes 5-8mm, as processing benchmark, in next step
It prepares；
(2) deep-hole boring hydraulic cylinder pipe diameter is to D+0.5mm, and wherein D is the hydraulic cylinder internal diameter that original image paper size requires；
(3) being embedded in an outer diameter in hydraulic cylinder steel pipe is D and with a thickness of the stainless steel tube of 1.2mm；It falls stainless steel tube upper end
2mm size is reserved at angle down and welds stainless steel tube with stainless steel electrode, processing weld seam is mutually neat to internal diameter, in order to avoid influence cold-drawn；
(4) it is D-0.4mm that hydraulic cylinder, which is integrally cold drawing to internal diameter, machines away cylinder barrel bottom end cold-drawn geometrical extension, and use stainless steel
Welding electrode lives stainless steel tube；
(5) honing internal diameter to drawing size requires, then carries out other corresponding mechanical process；It finally welds cylinder bottom and other is attached
Part.
2. the method as described in claim 1 for promoting the hydraulic cylinder service life using embedded stainless steel tube, it is characterized in that embedding not
The material of rust steel pipe is 304 or 316.
3. the method as claimed in claim 1 or 2 for promoting the hydraulic cylinder service life using embedded stainless steel tube, it is characterized in that stainless
Assurance of Size interference fit between outer diameter of steel pipes and hydraulic cylinder steel cylinder internal diameter, is pressed into stainless steel tube by external force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910665747.1A CN110421317A (en) | 2019-07-23 | 2019-07-23 | A method of the hydraulic cylinder service life is promoted using embedded stainless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910665747.1A CN110421317A (en) | 2019-07-23 | 2019-07-23 | A method of the hydraulic cylinder service life is promoted using embedded stainless steel tube |
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| Publication Number | Publication Date |
|---|---|
| CN110421317A true CN110421317A (en) | 2019-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910665747.1A Pending CN110421317A (en) | 2019-07-23 | 2019-07-23 | A method of the hydraulic cylinder service life is promoted using embedded stainless steel tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669966A (en) * | 2022-03-30 | 2022-06-28 | 武汉船用机械有限责任公司 | Machining method of oil cylinder body |
-
2019
- 2019-07-23 CN CN201910665747.1A patent/CN110421317A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669966A (en) * | 2022-03-30 | 2022-06-28 | 武汉船用机械有限责任公司 | Machining method of oil cylinder body |
| CN114669966B (en) * | 2022-03-30 | 2023-08-18 | 武汉船用机械有限责任公司 | Processing method of oil cylinder body |
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