CN112853140A - Silver oxide indium oxide electrical contact and production process thereof - Google Patents
Silver oxide indium oxide electrical contact and production process thereof Download PDFInfo
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- CN112853140A CN112853140A CN202011601599.6A CN202011601599A CN112853140A CN 112853140 A CN112853140 A CN 112853140A CN 202011601599 A CN202011601599 A CN 202011601599A CN 112853140 A CN112853140 A CN 112853140A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
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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
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
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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
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
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- Composite Materials (AREA)
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Abstract
The invention discloses an electrical contact of silver oxide indium oxide and a production process thereof, belonging to the technical field of electrical contacts. The electrical contact is composed of a metal matrix composite material with silver as a matrix and tin oxide and indium oxide as reinforcing phases, and the production process comprises the following steps: smelting a formula; b: atomizing; c: oxidizing inside the powder; d: isostatic pressing; e: sintering; f: hot-pressing the sheet; g: rolling; h: stamping; i: and (5) post-treatment. The silver tin oxide indium oxide electrical contact combines the advantages of a silver-based electrical contact, tin oxide and indium oxide materials, forms a metal-based composite material with silver as a matrix and metal oxide as a reinforcing phase, has excellent electrical properties such as arc erosion resistance, wear resistance, fusion welding resistance and the like, has long service life, is not damaged after being opened and closed for 100 ten thousand times in practice, and has great application value and economic value.
Description
Technical Field
The invention relates to the technical field of electrical contacts and processing, in particular to an electrical contact made of indium oxide silver oxide and a production process thereof.
Background
The main performance and the service life of the switching device depend on the quality of the contact material to a great extent, and the contact material generally requires good conductivity, lower contact resistance, higher fusion welding resistance, higher arc erosion resistance and material transfer resistance, so that the production process of the electrical contact is very important.
In the prior art, the silver cadmium oxide material has excellent electrical properties such as excellent arc extinguishing performance, fusion welding resistance and the like, and plays an important role in the whole low-voltage electrical contact material system, and is called as a universal contact. For example, chinese invention patent CN201511009074 discloses a method for preparing an additive-containing silver cadmium oxide sheet-like electrical contact, specifically comprising: calculating the required dosage of silver, cadmium and additives according to the material proportion of the prepared silver cadmium oxide electrical contact, and weighing for later use; continuously smelting the silver, the cadmium and the additives into AgCd alloy melt, and upward continuously casting the AgCd alloy melt into an AgCd alloy strip by adopting an upward continuous casting method; feeding a pure Ag strip and the obtained AgCd alloy strip into a tubular resistance furnace for heating, and then feeding the pure Ag strip and the obtained AgCd alloy strip into a roller for hot rolling compounding to obtain an AgCd/Ag composite strip; annealing, rolling and punch forming the obtained AgCd/Ag composite strip, and then carrying out internal oxidation treatment to obtain the AgCd/Ag composite strip; the heating process of the AgCd/Ag alloy strip and the pure Ag strip in the tubular resistance furnace and the processes after the heating process and before the heating process are carried out in a protective atmosphere. However, the silver cadmium oxide material contains heavy metal cadmium which is harmful to human bodies and the environment, and has the problem of cadmium pollution in the preparation, use and recovery processes of the material, is not environment-friendly, and does not meet the requirements of the existing green production and processing.
In addition, in the existing production process of the electrical contact, the size and the appearance of the oxide are directly influenced by the process flow and parameters, the property of the electrical contact material is greatly dependent on the selection of an oxidation treatment process and process parameters, in addition, when the pre-formed contact needs to be subjected to post-treatment, the deburring work needs to be carried out, the existing deburring device cannot effectively deburr the clamped and overlapped part when the clamped electrical contact is deburred, so that the deburring is not thorough enough, the forming work of the electrical contact is influenced, and meanwhile, the existing deburring device is not beneficial to multi-angle synchronous deburring work, the deburring is not thorough enough when the burrs are further deburred, the efficiency of the deburring work is reduced, the whole working process is increased, the efficiency is not high, and the requirement of the existing synergistic processing is not met.
The invention provides an electrical contact of indium oxide silver oxide and a production process thereof, aiming at least one problem in the prior art.
Disclosure of Invention
The invention aims to provide an electrical contact made of indium oxide silver oxide and a production process thereof, so as to solve the problems that heavy metal cadmium in electrical contact materials in the prior art is harmful to human bodies, the production process flow of the electrical contact is not clear, and when a preformed contact needs to be subjected to post-treatment, deburring work needs to be performed.
In order to achieve the purpose, the invention provides the following technical scheme: an indium oxide electrical contact of silver oxide, the electrical contact being a metal matrix composite with silver as the matrix and tin oxide and indium oxide as the reinforcing phases; the material composition and the mass percentage content are as follows:
silver: 85-92 percent;
tin: 5 to 10 percent;
indium (b): 3 to 5 percent;
zinc: 0.2 to 0.5 percent;
nickel: 0.2 to 0.5 percent;
bismuth: 0.1 to 0.2 percent;
cerium: 0.0 to 0.1 percent.
The invention also provides a production process of the silver oxide indium oxide electrical contact, which comprises the following steps:
a: smelting in a formula
Respectively weighing a proper amount of silver ingots, tin ingots, indium ingots, zinc powder, nickel powder, bismuth powder and cerium powder, putting the silver ingots, the tin ingots, the indium ingots, the zinc powder, the nickel powder and the bismuth powder into an induction smelting furnace for smelting, wherein the smelting temperature is not lower than 1000 ℃, and refining for 20 minutes;
b: atomization
Placing the material smelted in the step a) into a water flow mechanical atomizer, crushing molten metal liquid flow into liquid drops, and standing and condensing the liquid drops to obtain powder;
c: internal oxidation of powder
B, placing the atomized powder obtained in the step b into an oxidizer for oxidation;
d: isostatic pressing
Placing the powder oxidized in the step c into an isostatic pressing forming machine, and controlling the pressure at 150-200 MPa;
e: sintering
D, placing the powder formed in the step d into a sintering machine for sintering, so that the powder is converted into a metal matrix composite from a particle aggregate to obtain a blank;
f: hot extrusion sheet
Placing the blank obtained in the step e into an extrusion container, and enabling the blank to flow out of a specific die hole through an applied external force to obtain the required section shape and size;
g: rolling of
Rolling the extruded blank, and compressing by a rotary roller to reduce the section and increase the length of the blank;
h is stamping
Placing the rolled blank in a stamping die for stamping forming to obtain a preformed contact;
i: post-treatment
And respectively carrying out deburring, oil stain removing and bubble removing operations on the obtained preformed contact through a deburring device, an oil stain removing machine and a bubble removing machine to obtain the silver oxide indium oxide electrical contact.
Wherein, the deburring device in the working procedure i comprises a frame body and a motor, the top surface of the frame body is provided with the motor, the bottom surface of the motor is in key connection with a movable block, a reciprocating screw rod is arranged inside one end of the movable block, the surface of the reciprocating screw rod is sleeved with a first deburring mechanism, the lower end shaft of the reciprocating screw rod is connected with a planetary gear, the top end of the first deburring mechanism is fixed with a connecting wire, the top end of the movable block is fixed with a support rod, the surface of the support rod is respectively sleeved with a second deburring mechanism and a reset spring, one end of the planetary gear is meshed with a sun gear, the sun gear is rotatably connected with the inner wall of the lower end of the frame body through a shaft, the top surface of the sun gear is provided with a rocker, the other end of the rocker is connected with a connecting wheel, the top surface of the connecting wheel is in key connection with, and the top of fixed block and the upper end inner wall fixed connection of framework, transmission's the other end is connected with first back shaft, and the surface of first back shaft has cup jointed drive gear, drive gear's one end meshing is connected with driven gear, and driven gear's central key is connected with the second back shaft, the second back shaft stretches into the inside one end meshing of grip block and is connected with the belt, and the surface of belt is provided with the lug, the one end of grip block is rotated through the top surface of spacing axle with the fixed block and is connected, and the surface of spacing axle has cup jointed volute spiral spring.
Preferably, the movable block is in an L-shaped structure in front view, the first deburring mechanism and the movable block form a sliding structure through a reciprocating screw rod, and the second deburring mechanism and the movable block form a telescopic structure through a return spring.
Preferably, first deburring mechanism includes dead lever, coil spring, stopper, connecting rod and scraper, the inside of dead lever is provided with coil spring, and coil spring's one end is connected with the stopper, the connecting rod is installed in one side integration of stopper, and the connecting rod stretches out the outside one end of dead lever and is connected with the scraper, the inner structure of first deburring mechanism is unanimous with the inner structure of second deburring mechanism.
Preferably, the connecting wheel and the sun gear form a linkage structure through the rocker, and the connecting wheel is obliquely distributed in a plan view.
Preferably, the driven gears are symmetrically distributed about a transverse center line of the driving gear, and a diameter of the driving gear is larger than a diameter of the driven gears.
Preferably, the top view of the clamping blocks is arc-shaped, the clamping blocks are symmetrically distributed about the longitudinal center line of the fixed block, a slot is formed between the clamping blocks, and meanwhile the clamping blocks and the fixed block form a rotating structure through a volute spiral spring.
Preferably, the bumps are made of elastic rubber, and the bumps are distributed on the surface of the belt at equal angles.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the metal matrix composite material which takes silver as a matrix and tin oxide and indium oxide as reinforcing phases is adopted, the electric contact with heavy metal cadmium silver cadmium oxide in the prior art is abandoned, and the electric contact has excellent arc erosion resistance, wear resistance and fusion welding resistance.
2. According to the invention, by optimizing the preparation process, through formula smelting, atomization, powder internal oxidation, isostatic pressing, sintering, hot extrusion sheet, rolling, stamping and post-treatment, the prepared silver tin oxide and silver oxide electrical contact is not damaged after being actually opened and closed for 100 thousands of times, and has an ultra-long service life.
3. According to the invention, when the motor drives the planetary gear to rotate through the movable block, under the meshing action of the sun gear and the planetary gear, the planetary gear rotates around the sun gear and rotates, and simultaneously drives the sun gear to rotate, so that the reciprocating screw rod drives the first deburring mechanism to slide up and down while rotating, and simultaneously drives the second deburring mechanism to slide while rotating through the connecting wire, thereby being beneficial to multidirectional deburring work of an electrician contact and improving the overall working efficiency.
4. According to the invention, when the sun gear rotates, the rocker arranged obliquely drives the connecting wheel to rotate, so that the connecting wheel drives the driving gear to rotate through the connecting shaft and the transmission device, the driving gear drives the belt to rotate through the driven gear, the electrical contact is tightly pressed through the convex block, the belt rotates to drive the electrical contact to rotate, the efficiency of deburring work of the electrical contact is improved, and meanwhile, the phenomenon that the clamping overlapped part cannot effectively deburr is avoided.
Drawings
FIG. 1 is a schematic view of the overall front cross-sectional structure of the present invention;
FIG. 2 is a schematic view of a top-down connection structure of the belt and the bumps of the present invention;
FIG. 3 is a schematic view of a front view of the connection structure between the first supporting shaft and the driving gear of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 2 according to the present invention;
FIG. 5 is a schematic view of a top view of the connection structure of the sun gear and the rocker of the present invention;
FIG. 6 is a schematic view of the internal front cross-sectional structure of the first deburring mechanism of the present invention;
fig. 7 is a schematic view of a top connection structure of the driving gear and the driven gear of the present invention.
In the figure: 1. a frame body; 2. a motor; 3. a movable block; 4. a reciprocating screw rod; 5. a first deburring mechanism; 501. fixing the rod; 502. a coil spring; 503. a limiting block; 504. a connecting rod; 505. a scraper; 6. a planetary gear; 7. a connecting wire; 8. a support bar; 9. a second deburring mechanism; 10. a return spring; 11. a sun gear; 12. a rocker; 13. a connecting wheel; 14. a connecting shaft; 15. a fixed block; 16. a transmission device; 17. a first support shaft; 18. a drive gear; 19. a driven gear; 20. a second support shaft; 21. a clamping block; 22. a belt; 23. a bump; 24. a limiting shaft; 25. a spiral spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment discloses a silver oxide indium oxide electrical contact, which is a metal matrix composite material with silver as a matrix and tin oxide and indium oxide as reinforcing phases; the material composition and the mass percentage content are as follows:
silver: 85-92 percent;
tin: 5 to 10 percent;
indium (b): 3 to 5 percent;
zinc: 0.2 to 0.5 percent;
nickel: 0.2 to 0.5 percent;
bismuth: 0.1 to 0.2 percent;
cerium: 0.0 to 0.1 percent.
Example 2:
the embodiment discloses a production process of an indium oxide electrical contact made of silver oxide, which comprises the following steps:
a: smelting in a formula
Respectively weighing a proper amount of silver ingots, tin ingots, indium ingots, zinc powder, nickel powder, bismuth powder and cerium powder, putting the silver ingots, the tin ingots, the indium ingots, the zinc powder, the nickel powder, the bismuth powder and the cerium powder into an induction smelting furnace for smelting, wherein the smelting temperature is not lower than 1000 ℃, and refining for 20 minutes;
b: atomization
Placing the material smelted in the step a) into a water flow mechanical atomizer, crushing molten metal liquid flow into liquid drops, and standing and condensing the liquid drops to obtain powder;
c: internal oxidation of powder
B, placing the atomized powder obtained in the step b into an oxidizer for oxidation;
d: isostatic pressing
Placing the powder oxidized in the step c into an isostatic pressing forming machine, and controlling the pressure at 150-200 MPa;
e: sintering
D, placing the powder formed in the step d into a sintering machine for sintering, so that the powder is converted into a metal matrix composite from a particle aggregate to obtain a blank;
f: hot extrusion sheet
Placing the blank obtained in the step e into an extrusion container, and enabling the blank to flow out of a specific die hole through an applied external force to obtain the required section shape and size;
g: rolling of
Rolling the extruded blank, and compressing by a rotary roller to reduce the section and increase the length of the blank;
h is stamping
Placing the rolled blank in a stamping die for stamping forming to obtain a preformed contact;
i: post-treatment
And respectively carrying out deburring, oil stain removing and bubble removing operations on the obtained preformed contact through a deburring device, an oil stain removing machine and a bubble removing machine to obtain the silver oxide indium oxide electrical contact.
Wherein, referring to the attached figures 1-7, the deburring device in the process i comprises a frame body 1 and a motor 2, the top surface of the frame body 1 is provided with the motor 2, the bottom surface of the motor 2 is connected with a movable block 3 by a key, a reciprocating screw rod 4 is arranged inside one end of the movable block 3, a first deburring mechanism 5 is sleeved on the surface of the reciprocating screw rod 4, the lower end shaft of the reciprocating screw rod 4 is connected with a planetary gear 6, the top end of the first deburring mechanism 5 is fixed with a connecting wire 7, the top end of the movable block 3 is fixed with a support rod 8, the surface of the support rod 8 is respectively sleeved with a second deburring mechanism 9 and a return spring 10, one end of the planetary gear 6 is engaged with a sun gear 11, the sun gear 11 is rotatably connected with the inner wall of the lower end of the frame body 1 by a shaft, the top surface of the sun gear 11 is provided with a rocker 12, the other end of, and the connecting shaft 14 stretches into the inside one end surface cup joints transmission 16 of fixed block 15, and the top of fixed block 15 and the upper end inner wall fixed connection of framework 1, transmission 16's the other end is connected with first supporting shaft 17, and the surface of first supporting shaft 17 has cup jointed drive gear 18, the one end meshing of drive gear 18 is connected with driven gear 19, and driven gear 19's central key is connected with second back shaft 20, the inside one end meshing that second back shaft 20 stretches into grip block 21 is connected with belt 22, and the surface of belt 22 is provided with lug 23, the one end of grip block 21 is connected with the top surface rotation of fixed block 15 through spacing axle 24, and the surface cup joint of spacing axle 24 has volute spiral spring 25.
The front view of movable block 3 is "L" font structure, and first deburring mechanism 5 constitutes sliding structure through reciprocal lead screw 4 and movable block 3, and second deburring mechanism 9 passes through reset spring 10 and movable block 3 constitutes extending structure, it rotates and deburring work to have made things convenient for first deburring mechanism 5 and second deburring mechanism 9 to drive when movable block 3 is rotatory, simultaneously through the slip of first deburring mechanism 5 and second deburring mechanism 9, be favorable to carrying out diversified deburring work, the efficiency of whole work has been improved.
The connecting wheel 13 and the sun gear 11 form a linkage structure through the rocker 12, and the connecting wheel 13 is obliquely distributed when being overlooked, so that the connecting wheel 13 and the sun gear 11 are driven to rotate oppositely through the rocker 12 when the sun gear 11 rotates.
The driven gears 19 are symmetrically distributed about the transverse center line of the driving gear 18, and the diameter of the driving gear 18 is larger than that of the driven gears 19, so that the driving gear 18 is convenient to drive the driven gears 19 to rotate in the same direction when rotating, and the rotating speed of the driven gears 19 is improved.
The overlooking of grip block 21 is the arc form, and grip block 21 is about the longitudinal centerline symmetric distribution of fixed block 15 to form the fluting between the grip block 21, grip block 21 passes through volute spring 25 and fixed block 15 simultaneously and constitutes revolution mechanic, and under the elastic action through volute spring 25, make volute spring 25 drive grip block 21 rotatory that resets, made things convenient for grip block 21 to carry out the work of centre gripping location to electrician's contact.
The working principle of the embodiment is as follows: according to the figures 1-2 and 6, firstly, a worker places the frame body 1 at a proper position, then places the electrical contacts between the clamping blocks 21, the clamping blocks 21 clamp and position the electrical contacts under the elastic action of the volute spiral spring 25, then the worker connects the motor 2 with an external power supply and starts the motor 2, so that the motor 2 drives the movable block 3 to rotate, the movable block 3 drives the planetary gear 6 to rotate when rotating, the planetary gear 6 rotates around the sun gear 11 and drives the sun gear 11 to rotate under the meshing of the sun gear 11 and the planetary gear 6, the planetary gear 6 drives the reciprocating screw rod 4 to rotate when rotating, so that the reciprocating screw rod 4 drives the first deburring mechanism 5 to slide in a reciprocating manner, the connecting wire 7 is loosened when the first deburring mechanism 5 slides upwards, and the reset spring 10 operates, the reset spring 10 is convenient to push the second deburring mechanism 9 to reset and slide, the first deburring mechanism 5 drives the second deburring mechanism 9 to slide through the connecting line 7 when sliding downwards, the second deburring mechanism 9 is made to extrude the reset spring 10 to shrink and deform, and under the elastic action of the spiral spring 502 in the first deburring mechanism 5 and the second deburring mechanism 9, the limiting block 503 is made to push the scraper 505 to abut against the surface of the electrical contact through the connecting rod 504, so that the work of deburring the electrical contacts with various specifications is facilitated, meanwhile, the work of deburring the electrical contact in multiple angles is facilitated, and the overall applicability and practicability are improved;
according to fig. 1-5 and 7, when the sun gear 11 rotates, the rocker 12 drives the connecting wheel 13 to rotate reversely, so that the connecting wheel 13 drives the transmission device 16 in the fixing block 15 to operate through the connecting shaft 14, so that the transmission device 16 drives the driving gear 18 to rotate through the first supporting shaft 17, and then the driving gear 18 drives the driven gear 19 to rotate, when the driven gear 19 rotates, the belt 22 is driven to rotate through the second supporting shaft 20, so that the belt 22 drives the electrical contact to rotate through the bump 23, at the moment, the electrical contact and the first deburring mechanism 5 rotate reversely, thereby being beneficial to accelerating the efficiency of deburring work of the electrical contact, being beneficial to carrying out deburring work on the overlapped part of the electrical contact and the clamping block 21, and improving the thoroughness of deburring to a certain extent, the motor 2 and the transmission device 16 are known and existing technologies in the market, and will not be described in detail herein.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. An electrical contact of silver oxide indium oxide, comprising: the electrical contact is a metal matrix composite material with silver as a matrix and tin oxide and indium oxide as reinforcing phases; the material composition and the mass percentage content are as follows:
silver: 85-91 percent;
tin: 5 to 10 percent;
indium (b): 3 to 5 percent;
zinc: 0.2 to 0.5 percent;
nickel: 0.2 to 0.5 percent;
bismuth: 0.1 to 0.2 percent;
cerium: 0.0 to 0.1 percent.
2. A process for the production of an electrical contact of silver oxide indium oxide according to claim 1, characterized in that: the method comprises the following steps:
a: smelting in a formula
Respectively weighing a proper amount of silver ingots, tin ingots, indium ingots, zinc powder, nickel powder, bismuth powder and cerium powder, putting the silver ingots, the tin ingots, the indium ingots, the zinc powder, the nickel powder, the bismuth powder and the cerium powder into an induction smelting furnace for smelting, wherein the smelting temperature is not lower than 1000 ℃, and refining for 20 minutes;
b: atomization
Placing the material smelted in the step a) into a water flow mechanical atomizer, crushing molten metal liquid flow into liquid drops, and standing and condensing the liquid drops to obtain powder;
c: internal oxidation of powder
B, placing the atomized powder obtained in the step b into an oxidizer for oxidation;
d: isostatic pressing
Placing the powder oxidized in the step c into an isostatic pressing forming machine, and controlling the pressure at 150-200 MPa;
e: sintering
D, placing the powder formed in the step d into a sintering machine for sintering, so that the powder is converted into a metal matrix composite from a particle aggregate to obtain a blank;
f: hot extrusion sheet
Placing the blank obtained in the step e into an extrusion container, and enabling the blank to flow out of a specific die hole through an applied external force to obtain the required section shape and size;
g: rolling of
Rolling the extruded blank, and compressing by a rotary roller to reduce the section and increase the length of the blank;
h is stamping
Placing the rolled blank in a stamping die for stamping forming to obtain a preformed contact;
i: post-treatment
And respectively carrying out deburring, oil stain removing and bubble removing operations on the obtained preformed contact through a deburring device, an oil stain removing machine and a bubble removing machine to obtain the silver oxide indium oxide electrical contact.
3. A process for the production of an electrical contact of silver oxide indium oxide according to claim 2, wherein: the deburring device in the working procedure i comprises a frame body (1) and a motor (2), wherein the motor (2) is arranged on the top surface of the frame body (1), a movable block (3) is connected to the bottom surface of the motor (2) in a key mode, a reciprocating lead screw (4) is arranged inside one end of the movable block (3), a first deburring mechanism (5) is sleeved on the surface of the reciprocating lead screw (4), a planetary gear (6) is connected to the lower end shaft of the reciprocating lead screw (4), a connecting wire (7) is fixed to the top end of the first deburring mechanism (5), a supporting rod (8) is fixed to the top end of the movable block (3), a second deburring mechanism (9) and a reset spring (10) are respectively sleeved on the surface of the supporting rod (8), a sun gear (11) is meshed with one end of the planetary gear (6), and the sun gear (11) is rotatably connected with the inner wall of the lower end of the frame body (, the top surface of the sun gear (11) is provided with a rocker (12), the other end of the rocker (12) is connected with a connecting wheel (13), the top surface of the connecting wheel (13) is connected with a connecting shaft (14) in a key mode, a transmission device (16) is sleeved on the surface of one end, extending into the fixing block (15), of the connecting shaft (14), the top end of the fixing block (15) is fixedly connected with the inner wall of the upper end of the frame body (1), the other end of the transmission device (16) is connected with a first supporting shaft (17), a driving gear (18) is sleeved on the surface of the first supporting shaft (17), one end of the driving gear (18) is connected with a driven gear (19) in a meshed mode, the center of the driven gear (19) is connected with a second supporting shaft (20), one end, extending into the clamping block (21), of the second supporting shaft (20) is connected with a belt (22) in a, one end of the clamping block (21) is rotatably connected with the top surface of the fixed block (15) through a limiting shaft (24), and the surface of the limiting shaft (24) is sleeved with a volute spiral spring (25).
4. The deburring device of claim 3, wherein: the movable block (3) is of an L-shaped structure in front view, the first deburring mechanism (5) and the movable block (3) form a sliding structure through the reciprocating screw rod (4), and the second deburring mechanism (9) and the movable block (3) form a telescopic structure through the return spring (10).
5. The deburring device of claim 4, wherein: first deburring mechanism (5) is including dead lever (501), coil spring (502), stopper (503), connecting rod (504) and scraper (505), the inside of dead lever (501) is provided with coil spring (502), and the one end of coil spring (502) is connected with stopper (503), connecting rod (504) are installed in one side integration of stopper (503), and connecting rod (504) stretch out the outside one end of dead lever (501) and be connected with scraper (505), the inner structure of first deburring mechanism (5) is unanimous with the inner structure of second deburring mechanism (9).
6. The deburring device of claim 3, wherein: the connecting wheel (13) and the sun gear (11) form a linkage structure through the rocker (12), and the connecting wheel (13) is obliquely distributed in a overlooking mode.
7. The deburring device of claim 3, wherein: the driven gears (19) are symmetrically distributed about the transverse center line of the driving gear (18), and the diameter of the driving gear (18) is larger than that of the driven gears (19).
8. The deburring device of claim 3, wherein: the overlooking of the clamping blocks (21) is arc-shaped, the clamping blocks (21) are symmetrically distributed relative to the longitudinal central line of the fixed block (15), a groove is formed between the clamping blocks (21), and meanwhile the clamping blocks (21) and the fixed block (15) form a rotating structure through a volute spiral spring (25).
9. The deburring device of claim 3, wherein: the bumps (23) are made of elastic rubber materials, and the bumps (23) are distributed on the surface of the belt (22) at equal angles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011601599.6A CN112853140A (en) | 2020-12-30 | 2020-12-30 | Silver oxide indium oxide electrical contact and production process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770218A (en) * | 2021-09-07 | 2021-12-10 | 宁波东大神乐电工合金有限公司 | Silver tin oxide indium oxide electrical contact and production device thereof |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770218A (en) * | 2021-09-07 | 2021-12-10 | 宁波东大神乐电工合金有限公司 | Silver tin oxide indium oxide electrical contact and production device thereof |
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Application publication date: 20210528 |