CN109559920B - Preparation process of high-voltage circuit breaker spring - Google Patents
Preparation process of high-voltage circuit breaker spring Download PDFInfo
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- CN109559920B CN109559920B CN201811593727.XA CN201811593727A CN109559920B CN 109559920 B CN109559920 B CN 109559920B CN 201811593727 A CN201811593727 A CN 201811593727A CN 109559920 B CN109559920 B CN 109559920B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a preparation process of a high-voltage circuit breaker spring, which mainly comprises the following steps of material selection, blanking, end tip grinding, heating, coil spring, quenching treatment, tempering treatment, end face grinding treatment, shot blasting treatment, flaw detection, setting treatment, surface treatment, marking and packaging; wherein the tempered spring is subjected to thermal compression treatment by thermal compression equipment. According to the invention, the tempered spring is subjected to thermal compression treatment, so that the performance of the spring is improved, and the precision is improved.
Description
Technical Field
The invention relates to the technical field of spring preparation, in particular to a preparation process of a high-voltage circuit breaker spring.
Background
The high-voltage circuit breaker is a main part of high-voltage power transmission and transformation equipment, whether the high-voltage circuit breaker can safely operate or not plays a key role in guaranteeing the safe, stable and reliable operation of the whole high-voltage power transmission and transformation network, and a high-voltage circuit breaker spring is a core part in an operating mechanism and has a visible importance. Due to the requirement of the action reliability of the spring operating mechanism of the circuit breaker, the requirement on the load deviation of the spring is generally high and generally higher than the super precision of the national standard, and the free height change of the spring is less than or equal to 1% multiplied by Ho and the load change of P2 is less than or equal to 2% multiplied by P2 after the spring is stressed for 24 hours. It is also required that the loss of the spring load after the spring is pressed to the height of H2 for 72 hours in the environment of 80 ℃ is not more than 5% of the original industrial load. The spring perpendicularity requirement is also beyond the general standard requirement, and the perpendicularity is less than 1.2% of the free height.
The existing spring preparation process adopts a hot coil spring processing process, and generally comprises the working procedures of material inspection, blanking, end tip grinding, heating, coil spring, quenching, tempering, end face grinding, shot blasting, flaw detection, standing treatment, surface treatment, marking, packaging and the like, and the spring can be processed through the working procedures.
When the high-voltage circuit breaker spring is prepared by adopting a common hot-rolled spring processing technology, the height change of the spring and the change of the P2 load can not reach the standard after the spring is strongly pressed for 24 hours.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a preparation process of a high-voltage circuit breaker spring.
The above object of the present invention is achieved by the following technical solutions:
a high-voltage circuit breaker spring preparation process is characterized by mainly comprising the following steps of material selection, blanking, end tip grinding, heating, coil spring, quenching treatment, tempering treatment, end face grinding treatment, shot blasting treatment, flaw detection, setting treatment, surface treatment, marking and packaging; wherein the tempered spring is subjected to thermal compression treatment by thermal compression equipment.
Through adopting above-mentioned technical scheme, the spring is done at tempering when the preparation, carries out the thermal compression processing with the spring, makes keeping under the condition of surplus temperature, compresses to and tightly highly keeps a period, treats that the spring releases load after stable for the quality of spring obtains comprehensive promotion, makes each item index of spring all compound the requirement.
The invention is further configured to: the hot compression equipment comprises a main frame, and a compression mechanism and a limiting mechanism which are arranged on the main frame, wherein the compression mechanism is connected with the limiting mechanism, and comprises a driving assembly, an extrusion assembly and a positioning assembly;
the positioning assembly comprises a first fixing plate, a second fixing plate and a positioning roller, the first fixing plate is fixedly connected with the main frame, the second fixing plate is installed on the main frame below the first fixing plate in a sliding mode, a sliding block is arranged on the peripheral side wall of the second fixing plate, a sliding groove matched with the sliding block is formed in the main frame and is connected with the sliding groove in a sliding mode, the positioning roller is vertically installed on one side, close to the first fixing plate, of the second fixing plate, the first fixing plate is provided with a positioning hole, and the end, far away from the end connected with the second fixing plate, of the positioning roller penetrates through the positioning hole; and a first air cylinder is arranged below the second fixing plate, and a piston rod of the first air cylinder is connected with the second fixing plate.
Through adopting above-mentioned technical scheme, the drive assembly drive extrusion subassembly on the main frame will install the spring compression in locating component, and the in-process stop gear of compression is through spacing fixed with the spring to make the spring when the hot compression is handled, the deformation degree at both ends reduces, improves the quality of spring. When locating component location spring, lay the spring in stop gear on first fixed plate earlier, then drive actuating cylinder, make the piston rod of cylinder drive the second fixed plate and slide on the main frame, the sliding block slides in the sliding tray during slip, and play certain limiting displacement to the slip of second fixed plate, the second fixed plate drives the registration roller of installing on the second fixed plate and rises from first fixed plate below along the locating hole, thereby insert in the spring, play certain positioning displacement to the spring.
The invention is further configured to: the limiting mechanism comprises a rotating motor, a mounting frame is mounted on one side of the main frame, the rotating motor is mounted on the mounting frame, an output shaft of the rotating motor is in keyed connection with a rotating shaft, a connecting ring is mounted on the rotating shaft, more than one connecting block is connected to the outer side wall of the connecting ring along the circumferential direction, one end, far away from the connecting block, connected with the rotating shaft is connected with an adjusting assembly, the adjusting assembly comprises adjusting cylinders, and the inner diameters of the different adjusting cylinders are different;
the inner side wall of the connecting ring is provided with a lifting block, the peripheral side wall of the rotating shaft is provided with a lifting groove along the height direction of the rotating shaft, a guide rod is arranged in the lifting groove, two ends of the guide rod are connected with two ends of the lifting groove, the lifting block is provided with a guide hole, and the lifting block is arranged in the lifting groove through the guide rod and the guide hole in a sliding connection manner;
and a second air cylinder is arranged on the rotating shaft, and a piston rod of the second air cylinder is connected with the connecting ring.
Through adopting above-mentioned technical scheme, when the spring was installed on first fixed plate, the spring was installed earlier in the regulation drum rather than the chi footpath phase adaptation. When the adjusting cylinders are switched, the rotating motor is started firstly, the rotating motor output shaft rotates to drive the connecting ring to rotate, the connecting ring drives the connecting block to rotate, and the connecting block drives the adjusting cylinders to rotate, so that different adjusting cylinders are replaced and installed on the first fixing plate and correspond to the positioning holes. When the adjusting cylinder corresponds to the positioning hole, the second cylinder is started, the piston rod of the second cylinder drives the connecting ring to descend, the lifting block on the inner side wall of the connecting ring slides along the guide rod in the lifting groove when the connecting ring descends, the guide rod plays a certain limiting role for the sliding block, so that the lifting block is not easy to deviate when descending and ascending, and the sliding is more stable. The adjusting cylinder plays a limiting role at two ends of the spring during thermal compression, so that the deformation degree of the two ends of the spring during thermal compression is reduced, and the overall balance degree and quality of the spring are improved. The adjusting cylinder can rotate according to different springs to change different sizes, so that the adjusting cylinder can adapt to springs with different diameters to be processed.
The invention is further configured to: the main frame above the first fixing plate is connected with a mounting plate, the driving assembly comprises a third air cylinder, a piston rod of the third air cylinder is connected with a pushing block, the mounting plate is provided with a mounting hole, and the pushing block penetrates through the mounting hole to be connected with the extrusion assembly;
the extrusion subassembly includes the stripper plate, one side that first fixed plate was kept away from to the stripper plate is connected with the fixed block, the fixed slot has been seted up to the one end that promotes the piece and is close to the stripper plate, fixed block and fixed slot joint, the fixed orifices has been seted up on the lateral wall of fixed slot, flexible groove has been seted up on the lateral wall of fixed block, flexible inslot is provided with the spring, spring one end links to each other with flexible groove tank bottom, the other end of spring is connected with flexible piece, flexible piece is fixed with the fixed orifices joint.
Through adopting above-mentioned technical scheme, drive assembly when drive extrusion subassembly extrusion, at first the third cylinder drives and promotes the piece and slide the decline in the mounting hole, promotes the piece and drives the stripper plate and push down along the inner chamber of adjusting the drum to will adjust drum inner spring and compress. When the springs with different sizes are replaced and compressed, the extrusion plates with different sizes can be replaced to adapt to the sizes of the adjusting cylinders and the springs. When changing the stripper plate, press the flexible piece in the fixed orifices earlier from the fixed orifices outside looks fixed orifices inboard, the flexible inslot of impressing of piece, then pull out the stripper plate, make fixed block and fixed slot on the stripper plate separate, thereby demolish original stripper plate, when installing new stripper plate, the flexible piece on the fixed block on the new stripper plate is impressed flexible inslot earlier, then peg graft fixed block and fixed slot, peg graft the completion back, flexible piece is popped out by extruded spring from flexible inslot, thereby it is fixed with the fixed orifices joint to make flexible piece, thereby install new stripper plate on the drive assembly.
The invention is further configured to: the outer side wall of the adjusting cylinder of the hot compression equipment in the S8 hot compression treatment is coated with a heat insulating layer, and the heat insulating layer is prepared from the following raw materials in parts by weight: 50-70 parts of nano ceramic microspheres, 60-80 parts of water-based silicone-acrylic emulsion, 65-85 parts of fluorocarbon emulsion, 20-30 parts of titanium carbide particles and 120 parts of nano silicon dioxide aerogel.
By adopting the technical scheme, the heat-insulating layer is prepared by mixing the water-based silicone-acrylic emulsion and the fluorocarbon emulsion, the water-based silicone-acrylic emulsion combines the high temperature resistance, weather resistance, chemical resistance, hydrophobicity, low surface energy and low pollution resistance of organic silicon and the high color retention, flexibility and adhesiveness of acrylic resin, the water-based silicone-acrylic emulsion is environment-friendly building emulsion and coating with high weather resistance, high water resistance and pollution resistance, the fluorocarbon emulsion is also coating with good weather resistance and water resistance, and has good wet adhesiveness, when the coating prepared by mixing the two emulsions integrates the respective characteristics of the two emulsions, then the nano ceramic microspheres and titanium carbide particles are added into the mixed emulsion, the nano ceramic microspheres are hollow microspheres, the radiation heat and heat conduction of infrared rays can be effectively inhibited and shielded, the heat conductivity of titanium carbide is poor, and after the two emulsions are dispersed into the emulsion, the coating film formed by coating has a good heat insulation effect, the nano silica aerogel is the aerogel felt, and the nano silica aerogel has good heat insulation performance for reinforcing fibers, and the coating is coated on the outer side wall of the adjusting cylinder to further coat and insulate the adjusting cylinder, so that the waste heat of the spring in the adjusting cylinder can be reduced and dissipated in the hot compression process, and the compression quality of the spring in the compression process is better.
The invention is further configured to: the preparation method of the heat insulation layer comprises the following steps:
(1) firstly, mixing the water-based silicone-acrylic emulsion and the fluorocarbon emulsion at the temperature of 80-100 ℃, sequentially adding the nano ceramic microspheres and the titanium carbide particles, and uniformly stirring;
(2) then coating the emulsion on the outer side wall of the adjusting cylinder, coating the nano silicon dioxide aerogel, and supporting and fixing for 5-6 hours;
(3) and after the emulsion is solidified, removing the fixed supporting device.
By adopting the technical scheme, the water-based silicone-acrylic emulsion and the fluorocarbon emulsion are mixed and compounded at 80-100 ℃, so that the water-based silicone-acrylic emulsion and the fluorocarbon emulsion can be uniformly dispersed and mixed, then the nano ceramic microspheres and the titanium carbide particles are added in the stirring process, the nano ceramic microspheres and the titanium carbide particles are dispersed in the emulsion, and then coating is carried out, so that a coating with good uniform dispersion is formed on the surface of the metal, then the nano silicon dioxide aerogel felt is coated on the coated emulsion, and after the emulsion is cured, the aerogel felt is bonded with the coating and coats the metal, so that the heat preservation effect is generated on the metal.
The invention is further configured to: the inner side wall of the adjusting cylinder is coated with a wear-resistant layer, and the wear-resistant layer is prepared from the following raw materials in parts by weight: 10-20 parts of graphene, 10-15 parts of polytetrafluoroethylene, 10-15 parts of talcum powder, 80-100 parts of epoxy resin, 60-80 parts of polyamide resin, 20-25 parts of curing agent, 5-8 parts of boron nitride powder and 10-15 parts of iron powder.
By adopting the technical scheme, the graphene is high in strength and good in toughness, the polytetrafluoroethylene has excellent corrosion resistance, the talcum powder is mainly magnesium silicate, the epoxy resin is used as a main coating material, the polyamide resin is added, the bonding capacity of the epoxy resin is added, the curing agent plays a role in curing the resin, the graphene, the polytetrafluoroethylene and the talcum powder are mixed into the epoxy resin to serve as a filling agent, and the toughness of the graphene and the talcum powder is good, so that the toughness of the epoxy resin after curing is enhanced after the graphene and the talcum powder are filled into the epoxy resin, and the wear resistance and the lubricity of the epoxy resin layer are improved. The boron nitride and the iron powder are used as a base layer before coating and are used for the isolation resin layer, and the boron nitride has high hardness and can increase the wear resistance of the wear-resistant layer.
The invention is further configured to: the preparation method of the wear-resistant layer comprises the following steps:
(1) firstly, heating and melting boron nitride powder and iron powder, and then coating the molten boron nitride powder and the iron powder on the surface of a metal base layer in a net shape under the protection of argon;
(2) then, stirring and mixing the epoxy resin, the polyamide resin, the talcum powder, the graphene and the polytetrafluoroethylene uniformly at the temperature of 80-120 ℃, then adding the curing agent, and continuing to stir uniformly;
(3) and (3) coating the mixed solution in the step (2) on a metal base layer, and then grinding and polishing to obtain the wear-resistant layer.
By adopting the technical scheme, the boron nitride and the iron powder are firstly coated on the metal surface in a melting way to serve as a basic layer for adhering the isolation resin, then the epoxy resin and the polyamide resin are uniformly mixed at 80-120 ℃, the talcum powder, the graphene and the polytetrafluoroethylene filler are added, the mixture is fully stirred to obtain better dispersion, then the curing agent is added for curing, and the mixture is coated on the metal surface.
Compared with the prior art, the invention has the beneficial effects that:
1. after the tempering of the spring is finished, a thermal compression process is added in the processing process, and after the spring is compressed to a compact height for a period of time under the condition of remaining residual heat, the load is released after the spring is stabilized, so that the manufacturing precision of the spring is improved, and the production quality of the spring is improved;
2. when hot compression treatment is carried out on the hot compression equipment through the setting, the outer side wall of the adjusting cylinder of the hot compression equipment is coated with the heat insulation layer, and the inner side of the adjusting cylinder is coated with the wear-resistant layer, so that in the process of compressing the spring, preheating of the spring is slowly dissipated, the hot pressing effect is enhanced, and the abrasion of the spring is reduced.
Drawings
FIG. 1 is a perspective view of a thermal compression apparatus of the present invention;
FIG. 2 is a cross-sectional view of the thermal compression apparatus of the present invention;
fig. 3 is a partially enlarged view of a in fig. 2.
Reference numerals: 1. a main frame; 2. a compression mechanism; 21. a drive assembly; 22. an extrusion assembly; 221. mounting a plate; 222. a third cylinder; 223. a pushing block; 224. mounting holes; 225. a pressing plate; 23. a positioning assembly; 231. a first fixing plate; 232. a second fixing plate; 233. a slider; 234. a sliding groove; 235. positioning holes; 236. a positioning roller; 237. a first cylinder; 3. a limiting mechanism; 31. rotating the motor; 32. a rotating shaft; 33. a connecting ring; 331. a lifting block; 332. a lifting groove; 333. a guide bar; 334. a guide hole; 335. a second cylinder; 34. connecting blocks; 35. adjusting the cylinder; 36. a mounting frame; 4. a fixed block; 41. fixing grooves; 42. a telescopic groove; 43. a spring; 44. a telescopic block; 45. and (7) fixing holes.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The invention discloses a preparation process of a high-voltage circuit breaker spring, which comprises the following process steps: selecting materials, blanking, grinding tips, heating, coiling springs, quenching, tempering, hot compression, grinding end faces, shot blasting, detecting flaws, setting, surface treatment, marking and packaging;
referring to fig. 1, a thermal compression apparatus is used in a thermal compression process, and includes a main frame 1, and a compression mechanism 2 and a limit mechanism 3 mounted on the main frame 1.
Referring to fig. 2, the compression mechanism 2 includes a positioning assembly 23, the positioning assembly 23 includes a first fixing plate 231, a second fixing plate 232 and a positioning roller 236, a first air cylinder 237 is mounted on the main frame 1, and a piston rod of the first air cylinder 237 is connected to the second fixing plate 232; a sliding block 233 is arranged on the peripheral side wall of the second fixing plate 232, a sliding groove 234 used for matching with the sliding block 233 is arranged on the main frame 1, and the second fixing plate 232 is installed on the main frame 1 through the sliding block 233 and the sliding groove 234 in a sliding connection manner; the first fixing plate 231 is fixedly connected with the main frame 1 above the second fixing plate 232, one side of the second fixing plate 232 close to the first fixing plate 231 is vertically provided with a positioning roller 236, the first fixing plate 231 is provided with a positioning hole 235, and one end of the positioning roller 236 far away from the end connected with the second fixing plate 232 penetrates through the positioning hole 235 to be connected with the first fixing plate 231 in a sliding manner;
referring to fig. 2, the limiting mechanism 3 includes a rotating motor 31, one side of the main frame 1 is connected with a mounting frame 36, the rotating motor 31 is mounted on the mounting frame 36, an output shaft of the rotating motor 31 is keyed with a rotating shaft 32, a lifting groove 332 is formed in the peripheral side wall of the rotating shaft 32 along the height direction of the rotating shaft 32, a guide rod 333 is mounted in the lifting groove 332, two ends of the guide rod 333 are connected with two ends of the lifting groove 332, a lifting block 331 is slidably mounted in the lifting groove 332, a guide hole 334 is formed in the lifting block 331, the guide rod 333 is slidably connected with the guide hole 334, the lifting block 331 is connected with the inner side wall of the connecting ring 33 sleeved on the rotating shaft 32, more than one connecting block 34 is circumferentially connected on the outer side wall of the connecting ring 33, one end of the connecting block 34 far away from the connecting with the rotating shaft 32 is connected, the inner diameters of the different adjustment cylinders 35 are different. The rotating shaft 32 is further provided with a second cylinder 335, and the piston rod of the second cylinder 335 is connected to the connecting ring 33.
Referring to fig. 2, the compression mechanism 2 further includes a driving assembly 21 and an extrusion assembly 22, the main frame 1 above the first fixing plate 231 is connected with a mounting plate 221, the driving assembly 21 includes a third cylinder 222, the third cylinder 222 is mounted on the mounting plate 221, a piston rod of the third cylinder 222 is connected with a pushing block 223, the mounting plate 221 is provided with a mounting hole 224, and the pushing block 223 penetrates through the mounting hole 224 to be connected with the extrusion assembly 22;
referring to fig. 2 and 3, extrusion subassembly 22 includes stripper plate 225, and one side that first fixed plate 231 was kept away from to stripper plate 225 is connected with fixed block 4, promotes one end that piece 223 is close to stripper plate 225 and has seted up fixed slot 41, and fixed block 4 and fixed slot 41 joint have seted up fixed orifices 45 on the lateral wall of fixed slot 41, has seted up flexible groove 42 on the lateral wall of fixed block 4, is provided with spring 43 in the flexible groove 42, spring 43 one end links to each other with flexible groove 42 tank bottom, and the other end of spring 43 is connected with flexible piece 44, and flexible piece 44 is fixed with fixed orifices 45 joint.
The working principle is as follows:
the rotating motor 31 is started, the output shaft of the rotating motor 31 rotates to drive the connecting ring 33 to rotate, the connecting ring 33 drives the connecting block 34 to rotate, and the connecting block 34 drives the adjusting cylinder 35 to rotate, so that the adjusting cylinder 35 with the diameter corresponding to the spring 43 is replaced and installed on the first fixing plate 231 and corresponds to the positioning hole 235. When the adjusting cylinder 35 corresponds to the positioning hole 235, the second cylinder 335 is activated, the piston rod of the second cylinder 335 drives the connecting ring 33 to descend, and when the connecting ring 33 descends, the adjusting cylinder 35 is driven to be attached to the first fixing plate 231 by the lifting block 331 on the inner side wall of the connecting ring 33 sliding along the guide rod 333 in the lifting groove 332.
Then, the spring 43 is placed in the adjusting cylinder 35, and then the air cylinder is driven so that the piston rod of the air cylinder slides the second fixing plate 232 on the main frame 1, the slide block 233 slides in the slide groove 234, and the second fixing plate 232 lifts the positioning roller 236 mounted on the second fixing plate 232 along the positioning hole 235 from below the first fixing plate 231, thereby inserting into the spring 43.
Then, the third cylinder 222 is started, the third cylinder 222 drives the pushing block 223 to slide and descend in the mounting hole 224, and the pushing block 223 drives the pressing plate 225 to press down along the inner cavity of the adjusting cylinder 35, so that the spring 43 in the adjusting cylinder 35 is compressed.
When changing stripper plate 225, press the flexible piece 44 in the fixed orifices 45 from the fixed orifices 45 outside looks fixed orifices 45 inboard earlier, impress flexible piece 44 in flexible groove 42, then pull stripper plate 225, make fixed block 4 and fixed slot 41 on stripper plate 225 separate, thereby demolish original stripper plate 225, when installing new stripper plate 225, impress flexible piece 44 on the fixed block 4 on new stripper plate 225 in flexible groove 42 earlier, then peg graft fixed block 4 and fixed slot 41, after the grafting is accomplished, flexible piece 44 is popped out by extruded spring 43 in flexible groove 42, thereby make flexible piece 44 fixed with fixed orifices 45 joint, thereby install new stripper plate 225 on drive assembly 21.
The outer side wall of the adjusting cylinder of the hot compression device in the S8 hot compression treatment is coated with a heat insulating layer, and the preparation steps of the heat insulating layer are as follows:
(1) mixing 60 parts of water-based silicone-acrylic emulsion and 65 parts of fluorocarbon emulsion at 80 ℃, sequentially adding 50 parts of nano ceramic microspheres and 20 parts of titanium carbide particles, and uniformly stirring;
(2) then coating the emulsion on the outer side wall of the adjusting cylinder, coating 100 parts of nano silicon dioxide aerogel, and supporting and fixing for 5 hours;
(3) and after the emulsion is solidified, removing the fixed supporting device.
The inner side wall of the adjusting cylinder is coated with a wear-resistant layer, and the wear-resistant layer is prepared by the following steps:
(1) firstly, heating and melting 5 parts of boron nitride powder and 10 parts of iron powder, and coating the molten boron nitride powder and the iron powder on the surface of a metal base layer in a net shape under the protection of argon;
(2) then stirring and mixing 80 parts of epoxy resin and 60 parts of polyamide resin with 10 parts of talcum powder, 10 parts of graphene and 10 parts of polytetrafluoroethylene uniformly at 80 ℃, adding 20 parts of curing agent, and continuously stirring uniformly;
(3) and (3) coating the mixed solution in the step (2) on a metal base layer, and then grinding and polishing to obtain the wear-resistant layer.
Examples 2-17 differ from example 1 in that: the raw materials for preparing the wear-resistant layer are as follows in parts by weight:
examples 18-37 differ from example 1 in that: the raw materials for preparing the wear-resistant layer are as follows in parts by weight:
examples 38-41 differ from example 1 in that: when preparing the heat insulation layer, the thermometer in the step (1) is as follows:
| temperature of | |
| Example 38 | 85 |
| Example 39 | 90 |
| Example 40 | 95 |
| EXAMPLE 41 | 100 |
Examples 42 to 45 differ from example 1 in that: in the preparation of the wear resistant layer, the thermometers in step (2) are as follows:
| examples | Temperature of |
| Example 42 | 90 |
| Example 43 | 100 |
| Example 44 | 110 |
| Example 45 | 120 |
Examples 46 to 49 differ from example 1 in that: the fixed time in step (2) when preparing the thermal insulation layer is as follows:
| examples | Time h |
| Example 46 | 5.25 |
| Example 47 | 5.5 |
| Example 48 | 5.75 |
| Example 49 | 6 |
Comparative example
Comparative examples 1 to 4 differ from example 1 in that the raw materials for preparing the wear resistant layer in parts by weight are as follows:
| nano ceramic micro-bead | Aqueous silicone acrylic emulsion | Fluorocarbon emulsion | Titanium carbide fine particles | Nano-silica aerogel | |
| Comparative example 1 | 0 | 50 | 65 | 0 | 0 |
| Comparative example 2 | 50 | 50 | 65 | 0 | 0 |
| Comparative example 3 | 0 | 50 | 65 | 20 | 0 |
| Comparative example 4 | 0 | 50 | 65 | 0 | 100 |
Comparative examples 5 to 9 differ from example 1 in that the raw materials for preparing the abrasion resistant layer in parts by weight are as follows:
detection method
Abrasion resistance test
And scraping the material to be tested on a diamond sliding knife with the Mohs hardness of 8 by using the pressure of 50N, 100N and 150N, wherein the material to be tested is the inner side wall of the adjusting cylinder, and the wear resistance of the material is displayed by comparing the depth of the scratch. The scratch depth is marked as 1-10 grades from shallow to deep.
| Examples | Depth of scratch |
| Example 1 | |
| Example 18 | |
| Example 19 | |
| Example 20 | |
| Comparative example 5 | Stage 7 |
| Comparative example 6 | 4 stage |
| Comparative example 7 | Grade 6 |
| Comparative example 8 | Grade 6 |
| Comparative example 9 | Grade 6 |
Heat retention test
Sealing one end of an adjusting cylinder, then placing an iron block with the temperature of 200 ℃ into the adjusting cylinder, adjusting the room temperature outside the adjusting cylinder to be 25 ℃, then sealing the other end of the adjusting cylinder, arranging a temperature sensor in the adjusting cylinder, and measuring the temperature change measured by the temperature sensor within 1 hour.
| Examples | Temperature drop (. degree.C.) |
| Example 1 | 32 |
| Example 5 | 34 |
| Example 9 | 30 |
| Example 17 | 28 |
| Comparative example 1 | 96 |
| Comparative example 2 | 76 |
| Comparative example 3 | 88 |
| Comparative example 4 | 78 |
And (4) conclusion: as can be seen by comparing examples 1, 18, 19, 20 with comparative examples 5, 6, 7, 8, 9 in the table, the scratches on examples 1, 18, 19, 20 are significantly shallower than comparative examples 5, 6, 7, 8, 9, demonstrating that the wear resistant layer increases the wear resistance of the conditioning cylinder. Comparing examples 1, 5, 9 and 17 with comparative examples 1, 2, 3 and 4, it can be seen that the conditioning cylinder coated with the heat insulation layer has better heat insulation effect on the temperature in the conditioning cylinder, and can reduce heat loss. And the influence of the nano ceramic micro-beads and the nano silicon dioxide aerogel on the heat preservation effect is the largest.
Spring test
The springs manufactured in example 1 and springs manufactured by a general process were tested and tested in 10 groups, and the test results are as follows:
the general process comprises the following steps:
example 1:
and (4) conclusion: as can be seen from the comparison in the table, the spring produced by the general process has the spring load loss of more than or equal to 5% multiplied by P2 after being pressed to H2 for 72 hours in the environment of 80 ℃. The prefabricated height of the spring manufactured in the example 1 is obviously increased compared with that of the spring manufactured by the general process, and the spring load loss is less than or equal to 5 percent multiplied by P2 after the spring is pressed to H2 for 72 hours in the environment of 80 ℃. The verticality requirement is less than or equal to 5, the precision and indexes of all aspects are high, and the hot compression treatment process is proved to be capable of improving the quality of the spring.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. A high-voltage circuit breaker spring preparation process is characterized by mainly comprising the following steps of material selection, blanking, end tip grinding, heating, coil spring, quenching treatment, tempering treatment, end face grinding treatment, shot blasting treatment, flaw detection, setting treatment, surface treatment, marking and packaging; wherein the tempered spring is subjected to thermal compression treatment by thermal compression equipment; the hot compression equipment comprises a main frame (1), and a compression mechanism (2) and a limiting mechanism (3) which are arranged on the main frame (1), wherein the compression mechanism (2) is connected with the limiting mechanism (3), and the compression mechanism (2) comprises a driving assembly (21), an extrusion assembly (22) and a positioning assembly (23);
the positioning assembly (23) comprises a first fixing plate (231), a second fixing plate (232) and a positioning roller (236), the first fixing plate (231) is fixedly connected with the main frame (1), the second fixing plate (232) is slidably mounted on the main frame (1) below the first fixing plate (231), a sliding block (233) is arranged on the peripheral side wall of the second fixing plate (232), a sliding groove (234) matched with the sliding block (233) is formed in the main frame (1), the sliding block (233) is slidably connected with the sliding groove (234), the positioning roller (236) is vertically mounted on one side, close to the first fixing plate (231), of the second fixing plate (232), a positioning hole (235) is formed in the first fixing plate (231), and one end, far away from the end connected with the second fixing plate (232), of the positioning roller (236) penetrates through the positioning hole (235); a first air cylinder (237) is mounted below the second fixing plate (232), and a piston rod of the first air cylinder (237) is connected with the second fixing plate (232);
a mounting plate (221) is connected to the main frame (1) above the first fixing plate (231), the driving assembly (21) comprises a third cylinder (222), the third cylinder (222) is mounted on the mounting plate (221), a piston rod of the third cylinder (222) is connected with a pushing block (223), a mounting hole (224) is formed in the mounting plate (221), and the pushing block (223) penetrates through the mounting hole (224) to be connected with the extrusion assembly (22);
extrusion subassembly (22) are including stripper plate (225), one side that first fixed plate (231) was kept away from in stripper plate (225) is connected with fixed block (4), it has seted up fixed slot (41) to promote one end that piece (223) are close to stripper plate (225), fixed block (4) and fixed slot (41) joint, fixed orifices (45) have been seted up on the lateral wall of fixed slot (41), flexible groove (42) have been seted up on the lateral wall of fixed block (4), be provided with spring (43) in flexible groove (42), spring (43) one end links to each other with flexible groove (42) tank bottom, the other end of spring (43) is connected with flexible piece (44), flexible piece (44) are fixed with fixed slot (45) joint.
2. The process for preparing a spring for a high-voltage circuit breaker according to claim 1, wherein: the limiting mechanism (3) comprises a rotating motor (31), one side of the main frame (1) is connected with an installation frame (36), the rotating motor (31) is installed on the installation frame (36), an output shaft of the rotating motor (31) is in keyed connection with a rotating shaft (32), the rotating shaft (32) is provided with a connecting ring (33), the outer side wall of the connecting ring (33) is circumferentially connected with more than one connecting block (34), one end, far away from the end connected with the rotating shaft (32), of the connecting block (34) is connected with an adjusting assembly, the adjusting assembly comprises adjusting cylinders (35), and the inner diameters of the different adjusting cylinders (35) are different;
the inner side wall of the connecting ring (33) is provided with a lifting block (331), the peripheral side wall of the rotating shaft (32) is provided with a lifting groove (332) along the height direction of the rotating shaft (32), a guide rod (333) is installed in the lifting groove (332), two ends of the guide rod (333) are connected with two ends of the lifting groove (332), the lifting block (331) is provided with a guide hole (334), and the lifting block (331) is installed in the lifting groove (332) through the guide rod (333) and the guide hole (334) in a sliding connection manner;
the rotating shaft (32) is provided with a second air cylinder (335), and a piston rod of the second air cylinder (335) is connected with the connecting ring (33).
3. The process for preparing a spring for a high-voltage circuit breaker according to claim 2, wherein: the outer side wall of a regulating cylinder of the hot compression equipment in the hot compression treatment is coated with a heat insulating layer, and the heat insulating layer is prepared from the following raw materials in parts by weight: 50-70 parts of nano ceramic microspheres, 60-80 parts of water-based silicone-acrylic emulsion, 65-85 parts of fluorocarbon emulsion, 20-30 parts of titanium carbide particles and 120 parts of nano silicon dioxide aerogel.
4. A process for preparing a spring for a high voltage circuit breaker according to claim 3, wherein: the preparation method of the heat insulation layer comprises the following steps:
(1) firstly, mixing the water-based silicone-acrylic emulsion and the fluorocarbon emulsion at the temperature of 80-100 ℃, sequentially adding the nano ceramic microspheres and the titanium carbide particles, and uniformly stirring;
(2) then coating the emulsion on the outer side wall of the adjusting cylinder, coating the nano silicon dioxide aerogel, and supporting and fixing for 5-6 hours;
(3) and after the emulsion is solidified, removing the fixed supporting device.
5. The process for preparing a spring for a high-voltage circuit breaker according to claim 2, wherein: the inner side wall of the adjusting cylinder is coated with a wear-resistant layer, and the wear-resistant layer is prepared from the following raw materials in parts by weight: 10-20 parts of graphene, 10-15 parts of polytetrafluoroethylene, 10-15 parts of talcum powder, 80-100 parts of epoxy resin, 60-80 parts of polyamide resin, 20-25 parts of curing agent, 5-8 parts of boron nitride powder and 10-15 parts of iron powder.
6. The process for preparing a spring for a high-voltage circuit breaker according to claim 5, wherein: the preparation method of the wear-resistant layer comprises the following steps:
(1) firstly, heating and melting boron nitride powder and iron powder, and then coating the molten boron nitride powder and the iron powder on the surface of a metal base layer in a net shape under the protection of argon;
(2) then stirring and mixing the epoxy resin and the polyamide resin with the talcum powder, the graphene and the polytetrafluoroethylene uniformly at the temperature of 80-120 ℃, then adding the curing agent, and continuing to stir uniformly;
(3) and (3) coating the mixed solution in the step (2) on a metal base layer, and then grinding and polishing to obtain the wear-resistant layer.
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