CN103898576A - Blind hold repairing process of hydraulic oil cylinder - Google Patents

Abstract

The invention discloses a blind hold repairing process of a hydraulic oil cylinder. The process specifically comprises the following steps: I, honing: honing a damaged oil cylinder on a forcible honing machine with uniform front and back dimensions; and II, deoiling: injecting 4/5 of alkali liquor to the cylinder into a deoiling tank to remove oil by the alkali liquor, wherein the concentration of the alkali liquor is 5-10%, the temperature of the alkali liquor removing oil changes in a range from 60 DEG C to 80 DEG C within 1 hour, taking out the oil cylinder and pouring the solution on a bracket to secondarily remove oil, washing the alkali liquor by water before secondary oil removal, and brushing a nitro primer on the outer wall to protect. The process provided by the invention is simple in process and good in repairing effect, and the service life of the hydraulic oil cylinder is prolonged.

Description

Blind hole renovation technique in hydraulic ram

Technical field

The present invention relates to blind hole renovation technique in hydraulic ram.

Background technology

In hydraulic ram use procedure, often there will be fault, such as: coating come off, repair pit after electroplating inner without coating, electroplate after coating and part gets rusty, the coarse burr of coating and dross, coating force down firmly, coating has black streaking.In the time there is above-mentioned fault, need hydraulic ram to repair.

Summary of the invention

The object of this invention is to provide blind hole renovation technique in a kind of hydraulic ram, technological process is simple, and repairing effect is good, and hydraulic ram extends work-ing life.

Technical scheme of the present invention is as follows:

Blind hole renovation technique in hydraulic ram, specifically includes following operation steps:

1, honing

By the oil cylinder of damage be stuck on powerful honing machine, carry out honing before and after size unified;

2, oil removing

The alkali lye that injects 4/5 in degreasing tank is carried out to alkali liquor oil removing by cylinder, concentration of lye 5-10%, the temperature of alkali liquor oil removing changes in the scope of 60-80 ℃, 1 hour time, take out oil cylinder evacuation solution and carry out on the top of the shelf again secondary oil removing, before secondary oil removing, water washes down alkali lye, and protection at the bottom of Brush for outer wall nitro;

3, etch

Get concentrated hydrochloric acid and water is made into acid solution in the ratio of 80:20, then, with long cotton of upper about 150mm of sebific duct, immerse in acid solution, then take out, from cylinder, toward inner rotary, inwall outwash, brush one times, rush one time water, about three, four times, non-flushing for the last time, the directly lower groove of band acid;

4, put into chassis anode and connect electrode, tighten the screws guarantees that contact is good, connects the gentle rope of sour pump simultaneously, finally prepares start;

5, start

According to cylinder body negative electrode, the connection of alloy anode connects, then start, when start, select and exchange shelves, reversal raises simultaneously, and while opening, voltmeter pointer remains on zero position, and diameter is the outer shell of φ 220, then electric current approximately 350～400A～350A is crossed 10min and is fallen once table, on average fall about 30A, then all the other fall once table for every 5 minutes at every turn, during from start, calculate, 20 minutes time, drive sour pump, within 30 minutes, drive air pump; Then by low positive pole about half, AC-DC switch is gone to zero frequency span, start normal in plating, during interior plating, acidity remains at 1.0 left and right, lowly calculates the groove after having plated by the speed of 10/h while entering should add acid solution plating;

6, plating aftertreatment: plated after taking-up is cleaned and will soak 20-30min in the alkali lye of 5%-10%, washing is dried, and finally goes up honing machine honing to standard size, plating time=thickness of coating (mm)/0.02 × cathode current density (A/d).

The present invention adopts mechanical workout and chemical treatment to use simultaneously, and technological process is simple, and repairing effect is good, and hydraulic ram extends work-ing life.

Embodiment

Blind hole renovation technique in hydraulic ram, specifically includes following operation steps:

1, honing

By the oil cylinder of damage be stuck on powerful honing machine, carry out honing before and after size unified;

2, oil removing

The alkali lye that injects 4/5 in degreasing tank is carried out to alkali liquor oil removing by cylinder, concentration of lye 5-10%, the temperature of alkali liquor oil removing changes in the scope of 60-80 ℃, 1 hour time, take out oil cylinder evacuation solution and carry out on the top of the shelf again secondary oil removing, before secondary oil removing, water washes down alkali lye, and protection at the bottom of Brush for outer wall nitro;

3, etch

Get concentrated hydrochloric acid and water is made into acid solution in the ratio of 80:20, then, with long cotton of upper about 150mm of sebific duct, immerse in acid solution, then take out, from cylinder, toward inner rotary, inwall outwash, brush one times, rush one time water, about three, four times, non-flushing for the last time, the directly lower groove of band acid;

4, put into chassis anode and connect electrode, tighten the screws guarantees that contact is good, connects the gentle rope of sour pump simultaneously, finally prepares start;

5, start

According to cylinder body negative electrode, the connection of alloy anode connects, then start, when start, select and exchange shelves, reversal raises simultaneously, and while opening, voltmeter pointer remains on zero position, and diameter is the outer shell of φ 220, then electric current approximately 350～400A～350A is crossed 10min and is fallen once table, on average fall about 30A, then all the other fall once table for every 5 minutes at every turn, during from start, calculate, 20 minutes time, drive sour pump, within 30 minutes, drive air pump; Then by low positive pole about half, AC-DC switch is gone to zero frequency span, start normal in plating, during interior plating, acidity remains at 1.0 left and right, lowly calculates the groove after having plated by the speed of 10/h while entering should add acid solution plating;

6, plating aftertreatment: plated after taking-up is cleaned and will soak 20-30min in the alkali lye of 5%-10%, washing is dried, and finally goes up honing machine honing to standard size, plating time=thickness of coating (mm)/0.02 × cathode current density (A/d).

7, the making of negative electrode

With the low-carbon (LC) circle copper of φ 14mm, cutting several length can determine according to the degree of depth of cylinder, then be welded into a cylinder, then do a plunger with round log head, the hole bottom symmetry of an about 15mm of center drill is opened 6 or 8, slowly cuts deep about 10mm with cutting machine, then insert in the cold centre hole of water and put snakeskin hose, the other end of flexible pipe above (filling in half) ebonite pipe with one section of hard erucic acid sebific duct.Refute in the groove that connects opening, be bonded to button on anode above;

7, the making on chassis

First use the rigid plastic sheet of 10-15mm, make external diameter and be slightly smaller than the cylinder dish that cylinder bore, endoporus are a bit larger tham anode, drilling machine on dish, make external diameter large disk the same as plastic disc with thin moccasin of dipstick metering again, the hole that ground auger is same, then, be held together connecting a disk, when the chassis, moccasin under, mould plate upper.

8, the making of hanger

Making hanger with 50 × 5 band steel is according to hook use, is also its electric action, and each contact surface of hanger will guarantee that contact surface is good, otherwise quality is paid in impact first.

Plating solution compound method:

Plating solution can be directly with commercially available iron protochloride preparation, also can first make iron protochloride by oneself and (say that ten thousand the iron filings with wash clean added salt to have by making it dissolve after hydrochloric acid and iron filings effect in the hydrochloric acid soln of 2:1 dilution, solution approaches hand neutrality) solution of preparation is filtered, and analyze after iron protochloride content, can be used to prepare the dark liquid of plating iron.Take again appropriate calcium chloride, ammonium chloride, Manganse Dioxide adds after dissolving respectively and in groove, stirs evenly analysis and regulation (pH value be adjusted to 0.06～0.9 density 1.23～1.25) processing of then switching on, cathode current density is 8～10A101 ㎡, negative electrode and positive electrode area e is 1:4, pH value 1.0 left and right, electrolysis transfers bright green to solution, and (it is not obvious redness that the KCN3 solution with 1% is checked, represent ferric iron) when burr is glossiness spherical shape on negative electrode, can think that processing is qualified, can produce that (iron protochloride content is at 250～500g/l, plating iron density 1.20～1.23, 35～45 ℃ of temperature, it is 0.9～1.0 best that pH value remains on).Note: be again symmetric alternating current activation method without etching

Etching-free plating iron alloy technology is at 30～45 ℃, in the solution of ferrous chloride of pH value 0.6～0.9 density 1.21～1.23, utilize symmetrical alternating-current to impact, activate surface to be plated, treat that surface metal gloss obviously weakens an after-applied rush current, make forward current density be greater than negative current density, then progressively regulate forward or negative current density, make people finally be transitioned into direct current electrode position.

Fault and correcting method

Claims (1)

1. blind hole renovation technique in hydraulic ram, is characterized in that, specifically includes following operation steps:

(1), honing

By the oil cylinder of damage be stuck on powerful honing machine, carry out honing before and after size unified;

(2), oil removing

The alkali lye that injects 4/5 in degreasing tank is carried out to alkali liquor oil removing by cylinder, concentration of lye 5-10%, the temperature of alkali liquor oil removing changes in the scope of 60-80 ℃, 1 hour time, take out oil cylinder evacuation solution and carry out on the top of the shelf again secondary oil removing, before secondary oil removing, water washes down alkali lye, and protection at the bottom of Brush for outer wall nitro;

(3), etch

Get concentrated hydrochloric acid and water is made into acid solution in the ratio of 80:20, then, with long cotton of upper about 150mm of sebific duct, immerse in acid solution, then take out, from cylinder, toward inner rotary, inwall outwash, brush one times, rush one time water, about three, four times, non-flushing for the last time, the directly lower groove of band acid;

(4), put into chassis anode and connect electrode, tighten the screws guarantees that contact is good, connects the gentle rope of sour pump simultaneously, finally prepares start;

(5), start

According to cylinder body negative electrode, the connection of alloy anode connects, then start, when start, select and exchange shelves, reversal raises simultaneously, and while opening, voltmeter pointer remains on zero position, and diameter is the outer shell of φ 220, then electric current approximately 350～400A～350A is crossed 10min and is fallen once table, on average fall about 30A, then all the other fall once table for every 5 minutes at every turn, during from start, calculate, 20 minutes time, drive sour pump, within 30 minutes, drive air pump; Then by low positive pole about half, AC-DC switch is gone to zero frequency span, start normal in plating, during interior plating, acidity remains at 1.0 left and right, lowly calculates the groove after having plated by the speed of 10/h while entering should add acid solution plating;

(6), plating aftertreatment: plated after taking-up is cleaned and will soak 20-30min in the alkali lye of 5%-10%, washing is dried, and finally goes up honing machine honing to standard size, plating time=thickness of coating (mm)/0.02 × cathode current density (A/d).