CN103302141B - Disc-shaped panel leveling device and disc-shaped panel leveling method - Google Patents
Disc-shaped panel leveling device and disc-shaped panel leveling method Download PDFInfo
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- CN103302141B CN103302141B CN201310229373.1A CN201310229373A CN103302141B CN 103302141 B CN103302141 B CN 103302141B CN 201310229373 A CN201310229373 A CN 201310229373A CN 103302141 B CN103302141 B CN 103302141B
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Abstract
The invention relates to a disc-shaped panel leveling device and a disc-shaped panel leveling method. A furnace body of the disc-shaped panel leveling device is positioned in a portal frame and is fixed on a furnace body mounting table of the portal frame. A hydraulic cylinder is fixed on an upper beam of the furnace body. The lower end of a hydraulic cylinder piston of the hydraulic cylinder is inserted in the furnace body and an upper pressure head is fixed on the lower end face of the hydraulic cylinder piston. A parallelism regulating table is positioned in the furnace body and is fixed on the upper end face of a bearing pillar and a lower pressure head is positioned on the upper surface of the parallelism regulating table. The surface of the upper pressure head corresponds to the surface of the lower pressure head. Three electric stove wires are uniformly distributed on the periphery of the inner wall of the furnace body and both ends of each electric stove wire are respectively welded with one corresponding group of electrodes outside the furnace body. Three groups of electrodes are uniformly distributed on the furnace body. In the leveling process, nitrogen protective gas is adopted and each parameter is monitored and regulated in real time, so that the leveling qualified rate is improved to 95 percent; and moreover, the disc-shaped panel leveling device is provided with a characteristic which comprises a simple structure and is convenient to operate.
Description
Technical field
The present invention relates to hydraulic pressure and field of boilers, concrete solution aeroplane brake discs skeleton angularity excessive problem.
Background technology
During aircraft brake, hydraulic system is pressurizeed to Braking piston, hold heat reservoir assembly tightly, in heat reservoir assembly, between brake disc, form friction, produce amount of heat, thus temperature raises, because skeleton material is steel alloy, be often in this high pressure, under high-temperature condition, skeleton just easily produces buckling deformation, thus its angularity is exceeded standard.
To the angularity of brake disc skeleton, current Chinese Civil Aviation Maintenance requires that the product angularity being not more than the different piece number of 0.35 ~ 0.45mm(requires different in the industry), for the brake disc skeleton that angularity exceeds standard, airline or directly scrap and renew part, or take cold flattening method, namely at normal temperatures, the brake disc skeleton that need smooth adopts backing plate clamping, put into press to pressurize, pressurize, after about 10 hours, can reduce its surface warp degree, reach smoothing effect.
The method is convenient and simple, but shortcoming is the brake disc skeleton after smoothing easily to rebound, in pressure process, its internal stress is not eliminated completely, after pressure removes, will slowly there is warpage rebound phenomena in skeleton, impact smoothing effect, has 4-5 sheet skeleton to there will be this warpage bounce-back situation after general 10 skeletons smoothing.
Another kind method is hot smoothing method, and its process is: use padding plate clip clamping of workpieces, entirety puts into press or forcing press pressurizes, and then use bolt by fastening for backing plate locked, last entirety is put into heating furnace and heated and be incubated a period of time, air cooling.
Described hot smoothing mode, than cold smoothing method, is smoothed satisfactory for result, and smoothing qualification rate is about 90%.But cannot monitor in real time workpiece pressure when heat is smoothed and regulate, because of workpiece expanded by heating in heating furnace, pressure will inevitably increase, to the workpiece of some special materials, smoothing pressure is excessive, may cause damage to it; The workload being again dismounting is large, and surface of the work can produce oxide skin.
As, existing similar tractor clutch clutch plate smoothing technique: the frock backing plate that this smoothing technique uses is made up of ring discoid backing plate and screw rod.Its clutch plate is ring discoid plate, middle porose, before smoothing, first will be placed on the ring discoid backing plate of screw rod and bottom for smoothing annular workpieces string, after trade union college completes, the ring discoid backing plate string on top is covered workpiece on screw rod.Screw rod upper and lower side screw on nut and be screwed to stubborn motionless till.Then its entirety is put into heating furnace to carry out being heated to 600 ~ 800 DEG C, and be incubated 3 ~ 4 hours, take out from stove, take apart after making it naturally cool, reach smoothing effect.
This flattening method, the amount of labour is large, and in smoothing process, workpiece pressure is failed to understand, relies on Experience completely, cause smoothing effect lower, and frock backing plate and workpiece high temperature cools in atmosphere, can produce strong oxidation, affect the utilization again of frock backing plate.
Heat flattening method of the prior art is generally used for sheet metal part, is unsuitable for the heat smoothing of brake disc skeleton, and there is no the hot leveling apparatus being specifically designed to brake disc skeleton both at home and abroad at present.
Summary of the invention
For the aeroplane brake discs skeleton after overcoming the smoothing that exists in prior art easily rebound, to smooth pressure excessive, to the deficiency causing machine brake disc skeleton to damage, can the present invention proposes a kind of plate-like plate leveling apparatus and flattening method.
The plate-like plate leveling apparatus that the present invention proposes comprises hydraulic cylinder, portal frame, body of heater, insulation furnace lining, electric furnace heating wire, hydraulic cylinder piston, upper pressure head, thermocouple, lower pressure head, depth of parallelism adjustment platform and bearing column.
Body of heater is positioned at portal frame, and is fixed on the body of heater erecting bed of portal frame.Hydraulic cylinder is fixed on the entablature of body of heater.The lower end of the hydraulic cylinder piston of hydraulic cylinder is worn and is positioned at body of heater, and upper pressure head is fixed on the lower surface of hydraulic cylinder piston.Depth of parallelism adjustment platform is positioned at body of heater, and is fixed on the upper surface of bearing column, and lower pressure head is positioned at the upper surface of depth of parallelism adjustment platform.Described upper furnace body top has air inlet, and one end of this air inlet is connected with outer protection gas system, and the other end passes into body of heater inner chamber.The installation of TC is in the middle part of inboard wall of furnace body.Body of heater has exhaust outlet.The surface of upper pressure head is corresponding with the surface of lower pressure head.Article three, electric furnace heating wire is distributed on inboard wall of furnace body circumferentially, and one group of electrode welding that the two ends of each electric furnace heating wire are outside corresponding with body of heater respectively.Three groups of electrodes are distributed on body of heater.
Described electrode is inlaid in the electrode mounting hole on body of heater and fire door respectively; Respectively by over cap, described electrode is protected.
There is hydraulic cylinder piston via hole at the upper end center of body of heater, have bearing column via hole at the lower center of body of heater.Described hydraulic cylinder piston via hole is concentric with bearing column via hole.
The detailed process of the method for the described plate-like plate leveling apparatus smoothing aeroplane brake discs skeleton that the present invention proposes is:
Step 1, installs and treats smoothing aeroplane brake discs skeleton and backing plate: overlay in the lower pressure head of plate-like plate leveling apparatus successively by multiple aeroplane brake discs skeletons to be smoothed; When stacking, between adjacent aeroplane brake discs skeleton, all place one piece of backing plate, and have backing plate between the described aeroplane brake discs skeleton that stacks and the lower pressure head of plate-like plate leveling apparatus, have backing plate in the superiors of the described aeroplane brake discs skeleton stacked; Backing plate, treat smoothing aeroplane brake discs skeleton and lower pressure head and upper pressure head concentric.Press down upper pressure head, make upper pressure head touch topmost backing plate.
Step 2, logical protective gas.Using nitrogen as protection gas.Nitrogen flow is 0.8 ~ 1m
3/ h, blown converter, after 30 minutes, regulates shielding gas flow amount to 0.1 ~ 0.2m
3/ h also keeps, and closes this protection gas until open when fire door carries out air cooling.
Step 3, pressurization.Press down upper pressure head by external hydraulic control system, treat that smoothing skeleton pressurizes to mounted, moulding pressure is 9.0 ~ 9.5MPa and keeps this pressure.
Step 4, heating and insulation.Treat that smoothing aeroplane brake discs skeleton is heated to 590 ~ 640 DEG C and is incubated 2 ~ 4h to what pressurize.
Step 5, work-piece cools.Insulation terminates, and opens outer loop water cooling system, makes in-furnace temperature be down to 90 ~ 100 DEG C.Open fire door and carry out air cooling 30 ~ 40min, make the workpiece after smoothing can be cooled to 40 ~ 50 DEG C.
Step 6, retracts workpiece.Promote upper pressure head removal moulding pressure, obtain the aeroplane brake discs skeleton after smoothing.
The object of this invention is to provide a kind of by high temperature applying uniform pressure to aeroplane brake discs skeleton surface, and then reduce equipment and the aeroplane brake discs skeleton heat smoothing process of its angularity.
Analyze the reason according to aeroplane brake discs framework deformation, namely under long high temperature, high pressure, produce surface warp distortion because each position, skeleton surface pressurized is uneven.Realize reverse buckling deformations, namely under long high temperature, from the pressurization of its surface uniform of outer bound pair, eliminate its internal stress, carry out advantageous development, thus reach the object reducing angularity.
This invention also solves workpiece oxidation after pressure Real-Time Monitoring at present heat smoothing technique and adjustment, smoothing, problem that disassemble and assemble work amount is large, improve smoothing qualification rate further.
Compared with prior art, the beneficial effect that the present invention obtains is:
1. smooth qualification rate and be increased to 95%:
Concave arc surface bottom push-down head, matches with bearing column top, bottom convex arc surface, when seaming chuck presses down, can realize automatic regulating function, ensures that workpiece upper and lower surface is stressed parallel; The design of the angularity that the surface of upper push-down head and frock is less and circle, fits completely with skeleton surface, uniform force when skeleton is smoothed;
2. solve the problem of oxidation after workpiece smoothing:
In body of heater, dispensing has nitrogen protection gas, when heating, being incubated and cooling, can prevent skeleton, upper push-down head and pad surfaces high-temperature oxydation;
3. trade union college and dismounting mode simpler:
Pressue device from top to down, is positioned on lower pressure head successively by workpiece and backing plate or takes off.
4. in smoothing process, the display of parameters equal Real-Time Monitoring and real-time controllability:
Use temperature controller to realize gradient increased temperature and be heated to the setting of warm automatic heat preserving; Use relay to carry out the switch of hydraulic control valve, realize the control of Hydraulic Station, the real-time monitoring of pressure and adjustment, for the smoothing of different workpieces provides reference frame;
5. cooling-cycle device further reduce workpiece smoothing after cool time.Cool time about shortens 1-2 hour.
For verifying effect of the present invention, the 2612302 brake gear brake disc skeletons 10 angularities all being exceeded standard 0.4 ~ 0.9mm load in the heat smoothing stove of the present invention's proposition, and the flattening method proposed by the present invention has carried out hot smoothing.Brake disc skeleton after smoothing has the angularity of 3 to be 0.1 ~ 0.2mm, has the angularity of 4 to be 0.2 ~ 0.3mm, and remaining 4 angularities is 0.3 ~ 0.4mm, and smoothing result is all qualified.Follow-up repeatedly carry out smoothing test, only have once or twice test appearance 1 exceed standard, all the other are all qualified, smoothing qualification rate reach more than 95%; To come out of the stove workpiece surface colour smoothness, non-oxidation scaling phenomenon.
Accompanying drawing explanation
Fig. 1 is the structural representation of leveling apparatus;
Fig. 2 is the structural representation of furnace interior;
Scheme of installation when Fig. 3 is workpiece smoothing, wherein Fig. 3 a is front view, and Fig. 3 b is the partial enlarged drawing of Fig. 3 a;
Fig. 4 is the structural representation of portal frame;
Fig. 5 is the structural representation of depth of parallelism adjustment platform;
Fig. 6 is the structural representation of lower pressure head.
In figure: 1. hydraulic cylinder; 2. portal frame; 3. fire door; 4.C type presss from both sides; 5. fastening bolt; 6. over cap; 7. over cap securing member; 8. door-hinge; 9. electrode; 10 cooling nozzles; 11. bodies of heater; 12. insulation furnace linings; 13. upper pressure head fastening bolts; 14. electric furnace heating wires; 15. depth of parallelism adjustment platform fastening bolts; 16. hydraulic cylinder pistons; 17. upper pressure head; 18. thermocouples; 19. exhaust outlets; 20. lower pressure head; 21. depth of parallelism adjustment platforms; 22. bearing columns; 23. base of furnace body; 24. air inlets; 25. sealing flanges; 26. backing plates; 27. treat smoothing aeroplane brake discs skeleton; 28. body of heater erecting beds.
Detailed description of the invention
Embodiment 1
The present embodiment is a kind of plate-like plate leveling apparatus, comprises hydraulic cylinder 1, portal frame 2, body of heater 11, insulation furnace lining 12, electric furnace heating wire 14, hydraulic cylinder piston 16, upper pressure head 17, thermocouple 18, lower pressure head 20, the depth of parallelism adjustment platform 21, bearing column 22 and base of furnace body 23.
Portal frame 2 is the carrier of the present embodiment.Described portal frame 2 is frame structure, comprises pillar, entablature, body of heater erecting bed 28 and portal frame base.Described entablature and body of heater erecting bed 28 are rectangle.By shore supports between entablature and body of heater erecting bed 28, floor installation on sill, for supporting whole device.
Have hydraulic cylinder installing hole in the geometric center of described entablature, hydraulic cylinder 1 is fixed in this installing hole by fastening bolt 5.
Body of heater 11 is positioned at portal frame 2, to be fixed on the body of heater erecting bed 28 of portal frame 2 by base of furnace body 23.
Body of heater 11 has the cylindrical housings of end cap for two ends, and steel plate seal welding forms.At the insulation furnace lining 12 that body of heater 11 inner surface has 120mm thick, this insulation furnace lining is vacuum forming aluminum silicate fibre product.Upper end center and the lower center of the upper end center of body of heater 11 and lower center and insulation furnace lining 12 all have through hole.The through hole of described body of heater 11 upper end center and lower center is all concentric with the through hole of insulation furnace lining 12 upper end center and lower center, and the through hole of body of heater 11 upper end center is hydraulic cylinder piston via hole with the through hole of the upper end center of insulation furnace lining 12; The through hole of body of heater 11 lower center is bearing column via hole with the through hole of insulation furnace lining 12 lower center.
Have fire door 3 at body of heater circumferential surface, this fire door 3 is arranged on body of heater 11 by rotating shaft 8, can 135 ° of Unscrews, and is realized the closedown fastening of fire door by C-type clamp 4; Seal with elastometic washer is adopted between fire door and body of heater.Fire door 3 middle and upper part has one group of electrode mounting hole and cooling nozzle 10, for installing electrodes 9 and connection fire door 3 internal cooling water lines.Two arrays of electrodes installing hole is had at the circumferential surface of body of heater.Described totally three groups of electrode mounting holes are distributed on body of heater.
The lower end of the hydraulic cylinder piston 16 of hydraulic cylinder 1, through described hydraulic cylinder piston via hole, is positioned at body of heater 11.Described bearing column 22 is positioned at body of heater 11, and the lower end of this bearing column is fixed on described base of furnace body 23 upper surface through described bearing column via hole.Base of furnace body 23 is fixed on the body of heater erecting bed 28 of portal frame 2.
Upper pressure head 17 is positioned at body of heater 11, and is fixed on the end face of hydraulic cylinder piston 16 by upper pressure head fastening bolt 13.Depth of parallelism adjustment platform 21 is positioned at body of heater 11, and is fixed on the upper surface of bearing column 22 by depth of parallelism adjustment platform fastening bolt, and lower pressure head 20 is positioned at the upper surface of depth of parallelism adjustment platform 21.The surface of described upper pressure head 17 is corresponding with the surface of lower pressure head 20, and described upper pressure head 17 is under the drive of hydraulic cylinder piston 16, and the move distance along body of heater axis is 300mm.This hydraulic cylinder 1 and hydraulic cylinder piston 16 are connected with external hydraulic station by fluid pressure line, and by the relay in switch board, carry out the switch of hydraulic valve in hydraulic control station, realize adding/pressure relief; The real-time display of moulding pressure is realized by pressure display instrument in switch board.
Sealing flange 25 is set with on hydraulic cylinder piston 16, is connected by securing member with body of heater top flange, realizes the dynamic seal (packing) at body of heater 11 top.
Electrode 9 has 6, is divided into three groups, and wherein one group is arranged on fire door, and all the other two groups are arranged on and are distributed on body of heater.Described electrode 9 is inlaid in the electrode mounting hole on body of heater and fire door respectively, and one end is communicated with the electric furnace heating wire be positioned on inboard wall of furnace body respectively, the other end is connected with external control cabinet power supply respectively, and the temperature controller in external control cabinet realizes heating and the insulation of body of heater 11 by the size of control inputs electrode 9 electric current; Respectively by over cap 6, described electrode is protected, get an electric shock to prevent personnel.A described over cap 6 is fixed on fire door by over cap securing member 7, and two over caps 6 are fixed on body of heater by over cap securing member 7.Cooling nozzle 10 is connected with external refrigeration water circulation system by pipeline.
Heater adopts Cr20Ni80 high-temperature electric heated filament.Article three, electric furnace heating wire 14 is coiled into " it " shape and is distributed on inboard wall of furnace body circumferentially, to ensure furnace temperature decision to greatest extent.Wherein electric furnace heating wire is positioned at the inner surface of fire door.One group of electrode 9 that the two ends of each electric furnace heating wire 14 are outside corresponding with body of heater respectively welds.
Body of heater 11 top has air inlet 24, and one end of this air inlet is connected with outer protection gas system, and the other end passes into body of heater inner chamber.Have thermocouple mounting hole in the middle part of inboard wall of furnace body, thermocouple 18 is installed.Described thermocouple adopts K calibration thermocouple, and it is inner that thermocouple 18 one end is positioned at body of heater 3, and the other end is connected with outside electrical control cabinet, monitors in-furnace temperature in real time.Body of heater below thermocouple 18 installing hole there is exhaust outlet 19, for deaeration.
The pressue device of the present embodiment adopts conventional hydraulic pressurization.By regulating the pressure of pressure-reducing valve can keeping system pressure, thus realize the pressure be applied in heating process on workpiece and keep substantially constant.Pressurization oil cylinder is arranged on directly over body of heater, is flexibly connected with adopting between upper platen, can moves up and down at oil cylinder effect pressing disc, range 300mm.
The protective atmosphere device of the present embodiment adopts prior art, is made up of source of the gas, bus-bar, and dispensing air bottle fixing bracket.Cooling water recirculation system adopts prior art, comprises body of heater and is built-in with but water circulation pipe, for the inner cooling with oil cylinder, electrode connection.And be furnished with cooling circulation water tank.
Embodiment 2
The present embodiment utilizes the method that described in embodiment 1, plate-like plate leveling apparatus is smoothed aircraft brake disc skeleton, and detailed process is:
Step 1, installs and treats smoothing aeroplane brake discs skeleton 27 and backing plate 26.As shown in Figure 3, first to outward winding C-type clamp 4, open fire door, promote upper pressure head 17 by external hydraulic control system, the relay in regulable control cabinet, with hydraulic valve in hydraulic control station, oil extraction release is carried out to hydraulic cylinder 1, make hydraulic cylinder piston 16 drive upper pressure head 17 to promote 260mm according to the quantity of required smoothing workpiece, then in lower pressure head 20, place one piece of backing plate 26, then treat smoothing aeroplane brake discs skeleton 27 in backing plate 26 center placement a slice successively.During installation, backing plate 26, treat smoothing aeroplane brake discs skeleton 27 and lower pressure head 20 and upper pressure head 17 concentric.After trade union college, place one piece of backing plate 26 at its topmost.Relay in regulable control cabinet, carrys out hydraulic valve in hydraulic control station, carries out oiling pressurization to hydraulic cylinder 1, makes hydraulic cylinder piston 16 drive upper pressure head 17 to press down, makes upper pressure head 17 touch topmost backing plate 26, now do not need workpiece pressing.Then close fire door, screw C-type clamp 4.
Step 2, logical protective gas.
Using nitrogen as protection gas.Nitrogen flow is 0.8 ~ 1m
3/ h, blown converter, after 30 minutes, regulates shielding gas flow amount to 0.1 ~ 0.2m
3/ h also keeps, and closes this protection gas until open when fire door carries out air cooling.In the present embodiment, nitrogen flow is 1m
3/ h, regulates shielding gas flow amount to 0.1m
3/ h is also retained to when carrying out air cooling.
Step 3, pressurization.
By the relay in regulable control cabinet, carry out hydraulic valve in hydraulic control station, oiling pressurization is carried out to hydraulic cylinder 1, hydraulic cylinder piston 16 is made to drive upper pressure head 17 to press down, treat that smoothing skeleton pressurizes to mounted, until pressure display instrument display pressure is 9.0 ~ 9.5MPa, and keep this pressure.In the present embodiment, pressure is 9.5MPa.
Step 4, heating and insulation.
To what pressurize, control temperature controller treats that smoothing aeroplane brake discs skeleton 27 heats, first the maximum heating temperature arranging temperature controller is 590 ~ 640 DEG C, opens heating power supply and heats, after being heated to set temperature, temperature controller is incubated automatically, and temperature retention time is 2 ~ 4h.In the present embodiment, heating-up temperature is 640 DEG C, and temperature retention time is 4h.
Step 5, work-piece cools.
After insulation terminates, close heating power supply, open outer loop water cooling system, cooling 5 ~ 6h, makes in-furnace temperature be down to 90 ~ 100 DEG C.Open fire door to carry out cooling in air, cooling 30 ~ 40min, the workpiece after smoothing can be cooled to 40 ~ 50 DEG C.
Step 6, retracts workpiece.
Promote upper pressure head 17 removal moulding pressure by hydraulic system, obtain the aeroplane brake discs skeleton after smoothing.
Embodiment 3
The present embodiment is aircraft brake disc skeleton flattening method, and detailed process is:
Step 1, installs and treats smoothing aeroplane brake discs skeleton 27 and backing plate 26.As shown in Figure 3, first to outward winding C-type clamp 4, open fire door, upper pressure head 17 is promoted by external hydraulic control system, relay in regulable control cabinet, with hydraulic valve in hydraulic control station, carries out oil extraction release to hydraulic cylinder 1, hydraulic cylinder piston 16 is made to drive upper pressure head 17 to promote, and the hoisting depth of quantity determination upper pressure head according to required smoothing workpiece.Lower pressure head 20 places one piece of backing plate 26, then treats smoothing aeroplane brake discs skeleton 27 in backing plate 26 center placement a slice successively.During installation, backing plate 26, treat smoothing aeroplane brake discs skeleton 27 and lower pressure head 20 and upper pressure head 17 concentric.After trade union college, place one piece of backing plate 26 at its topmost.Relay in regulable control cabinet, carrys out hydraulic valve in hydraulic control station, carries out oiling pressurization to hydraulic cylinder 1, makes hydraulic cylinder piston 16 drive upper pressure head 17 to press down, makes upper pressure head 17, make upper pressure head 17 touch topmost backing plate 26, does not now need pressurization.Then close fire door, screw C-type clamp 4.
Step 2, logical protective gas.
Using nitrogen as protection gas.Nitrogen flow is 0.8 ~ 1m
3/ h, blown converter, after 30 minutes, regulates shielding gas flow amount to 0.1 ~ 0.2m
3/ h also keeps, and closes this protection gas until open when fire door carries out air cooling.In the present embodiment, nitrogen flow is 0.8m
3/ h, regulates shielding gas flow amount to 0.15m
3/ h is also retained to when carrying out air cooling.
Step 3, pressurization.
By the relay in regulable control cabinet, carry out hydraulic valve in hydraulic control station, oiling pressurization is carried out to hydraulic cylinder 1, make hydraulic cylinder piston 16 drive upper pressure head 17 to press down, treat that smoothing skeleton pressurizes to mounted, until pressure display instrument display pressure is 9.0 ~ 9.5MPa and keeps this pressure.In the present embodiment, pressure is 9.2MPa.
Step 4, heating and insulation.
Treat that smoothing aeroplane brake discs skeleton 27 heats to what pressurize, first arranging heating-up temperature is 590 ~ 640 DEG C, and power-on heats, and after being heated to set temperature, be incubated, temperature retention time is 2 ~ 4h.In the present embodiment, heating-up temperature is 590 DEG C, and temperature retention time is 2h.
Step 5, work-piece cools.
Insulation terminates, and opens outer loop water cooling system, and cooling 5 ~ 6h, makes in-furnace temperature be down to 90 ~ 100 DEG C.Open fire door to carry out cooling in air, cooling 30 ~ 40min, makes the workpiece after smoothing can be cooled to 40 ~ 50 DEG C.
Step 6, retracts workpiece.
Promote upper pressure head 17 removal moulding pressure by hydraulic system, obtain the aeroplane brake discs skeleton after smoothing.
Embodiment 4
The present embodiment is aircraft brake disc skeleton flattening method, and detailed process is:
Step 1, installs and treats smoothing aeroplane brake discs skeleton 27 and backing plate 26.As shown in Figure 3, first to outward winding C-type clamp 4, open fire door, upper pressure head 17 is promoted by external hydraulic control system, relay in regulable control cabinet, with hydraulic valve in hydraulic control station, carries out oil extraction release to hydraulic cylinder 1, hydraulic cylinder piston 16 is made to drive upper pressure head 17, and according to the quantity determination hoisting depth of required smoothing workpiece.Lower pressure head 20 places one piece of backing plate 26, then treats smoothing aeroplane brake discs skeleton 27 in backing plate 26 center placement a slice successively.During installation, backing plate 26, treat smoothing aeroplane brake discs skeleton 27 and lower pressure head 20 and upper pressure head 17 concentric.After trade union college, place one piece of backing plate 26 at its topmost.Relay in regulable control cabinet, carrys out hydraulic valve in hydraulic control station, carries out oiling pressurization to hydraulic cylinder 1, makes hydraulic cylinder piston 16 drive upper pressure head 17 to press down, makes upper pressure head 17 touch topmost backing plate 26, now do not need workpiece pressing.Then close fire door, screw C-type clamp 4.
Step 2, logical protective gas.
Using nitrogen as protection gas.Nitrogen flow is 0.8 ~ 1m
3/ h, blown converter, after 30 minutes, regulates shielding gas flow amount to 0.1 ~ 0.2m
3/ h also keeps, and closes this protection gas until open when fire door carries out air cooling.In the present embodiment, nitrogen flow is 0.9m
3/ h, regulates shielding gas flow amount to 0.2m
3/ h is also retained to when carrying out air cooling.
Step 3, pressurization.
By the relay in regulable control cabinet, carry out hydraulic valve in hydraulic control station, oiling pressurization is carried out to hydraulic cylinder 1, make hydraulic cylinder piston 16 drive upper pressure head 17 to press down, treat that smoothing skeleton pressurizes to mounted, until pressure display instrument display pressure is 9.0 ~ 9.5MPa and keeps this pressure.In the present embodiment, pressure is 9.0MPa.
Step 4, heating and insulation.
Treat that smoothing aeroplane brake discs skeleton 27 heats to what pressurize, first arranging heating-up temperature is 590 ~ 640 DEG C, and power-on heats, and after being heated to set temperature, be incubated, temperature retention time is 2 ~ 4h.In the present embodiment, heating-up temperature is 620 DEG C, and temperature retention time is 3h.
Step 5, work-piece cools.
Insulation terminates, and opens outer loop water cooling system, and cooling 5 ~ 6h, makes in-furnace temperature be down to 90 ~ 100 DEG C.Open fire door to carry out cooling in air, cooling 30 ~ 40min, makes the workpiece after smoothing can be cooled to 40 ~ 50 DEG C.
Step 6, retracts workpiece.
Promote upper pressure head 17 removal moulding pressure by hydraulic system, obtain the aeroplane brake discs skeleton after smoothing.
Claims (1)
1. smooth the method for aeroplane brake discs skeleton for one kind, utilize plate-like plate leveling apparatus to smooth, described plate-like plate leveling apparatus comprises hydraulic cylinder, portal frame, body of heater, insulation furnace lining, electric furnace heating wire, hydraulic cylinder piston, upper pressure head, thermocouple, lower pressure head, depth of parallelism adjustment platform and bearing column; Body of heater is positioned at portal frame, and is fixed on the body of heater erecting bed of portal frame; Hydraulic cylinder is fixed on the entablature of body of heater; The lower end of the hydraulic cylinder piston of hydraulic cylinder is worn and is positioned at body of heater, and upper pressure head is fixed on the lower surface of hydraulic cylinder piston; Depth of parallelism adjustment platform is positioned at body of heater, and is fixed on the upper surface of bearing column, and lower pressure head is positioned at the upper surface of depth of parallelism adjustment platform; Described body of heater top has air inlet, and one end of this air inlet is connected with outer protection gas system, and the other end passes into body of heater inner chamber; The installation of TC is in the middle part of inboard wall of furnace body; Body of heater has exhaust outlet; The surface of upper pressure head is corresponding with the surface of lower pressure head; Article three, electric furnace heating wire is distributed on inboard wall of furnace body circumferentially, and one group of electrode welding that the two ends of each electric furnace heating wire are outside corresponding with body of heater respectively; Three groups of electrodes are distributed on body of heater; It is characterized in that, detailed process is:
Step 1, installs and treats smoothing aeroplane brake discs skeleton and backing plate: overlay in the lower pressure head of plate-like plate leveling apparatus successively by multiple aeroplane brake discs skeletons to be smoothed; When stacking, between adjacent aeroplane brake discs skeleton, all place one piece of backing plate, and have backing plate between the described aeroplane brake discs skeleton that stacks and the lower pressure head of plate-like plate leveling apparatus, have backing plate in the superiors of the described aeroplane brake discs skeleton stacked; Backing plate, treat smoothing aeroplane brake discs skeleton and lower pressure head and upper pressure head concentric; Press down upper pressure head, make upper pressure head touch topmost backing plate;
Step 2, logical protective gas; Using nitrogen as protection gas; Nitrogen flow is 0.8 ~ 1m
3/ h, blown converter, after 30 minutes, regulates shielding gas flow amount to 0.1 ~ 0.2m
3/ h also keeps, and closes this protection gas until open when fire door carries out air cooling;
Step 3, pressurization; Press down upper pressure head by external hydraulic control system, treat that smoothing skeleton pressurizes to mounted, moulding pressure is 9.0 ~ 9.5MPa and keeps this pressure;
Step 4, heating and insulation; Treat that smoothing aeroplane brake discs skeleton is heated to 590 ~ 640 DEG C and is incubated 2 ~ 4h to what pressurize;
Step 5, work-piece cools; Insulation terminates, and opens outer loop water cooling system, makes in-furnace temperature be down to 90 ~ 100 DEG C; Open fire door and carry out air cooling 30 ~ 40min, make work-piece cools to 40 ~ 50 DEG C after smoothing;
Step 6, retracts workpiece; Promote upper pressure head removal moulding pressure, obtain the aeroplane brake discs skeleton after smoothing.
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| CN201310229373.1A CN103302141B (en) | 2013-06-09 | 2013-06-09 | Disc-shaped panel leveling device and disc-shaped panel leveling method |
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| CN104493438A (en) * | 2014-11-27 | 2015-04-08 | 丹阳市腾辉液压机械有限公司 | Inspecting and discharging device in hydraulic-valve bottom plate continuous machine shaping series |
| CN107321819B (en) * | 2017-08-19 | 2018-12-28 | 成都市联余精密机械有限公司 | A kind of hot gyp's skill suitable for long narrow slat type part |
| CN110116148B (en) * | 2019-06-10 | 2024-01-16 | 宝鸡市泛美材料科技有限公司 | Positive pressure creep leveling furnace |
| CN115055539A (en) * | 2022-08-16 | 2022-09-16 | 新沂市振港金属制品有限公司 | Raw materials leveling device is used in metal product production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2184176Y (en) * | 1994-01-17 | 1994-11-30 | 郑云会 | Pressurised electric tempering furnace |
| JP3136507B2 (en) * | 1994-06-29 | 2001-02-19 | 新日本製鐵株式会社 | Vacuum creep shape correction method for metal sheet |
| GB2399093A (en) * | 2003-03-03 | 2004-09-08 | Bombardier Transp Gmbh | Heat treatment of vehicle body panels using cooling contact plate |
| CN202146929U (en) * | 2011-06-23 | 2012-02-22 | 株洲佳邦难熔金属有限公司 | Novel heating leveling device |
| CN202239064U (en) * | 2011-10-26 | 2012-05-30 | 东风汽车股份有限公司 | Tray type leveling machine |
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