CN204108008U - By the multidirectional extruding of amorphous alloy, coated device is carried out to wire rod - Google Patents

Abstract

The utility model relates to a device for coating wire rods through multidirectional extrusion of an amorphous alloy. The extrusion die is divided into an upper block of the extrusion die and a lower block of the extrusion die. When the blocks and the lower blocks of the extrusion die are assembled together, the wire channel, the extrusion punch channel, the blank room, the welding room and the forming room can be formed, wherein the direction of the wire channel and the extrusion punch channel is vertical, and the blank room, extrusion The punch channel is on the same line, the welding chamber, the forming room and the wire channel are on the same line. There is a blank room and an extrusion punch channel on both sides of the wire channel, and the outlet of the wire channel is provided with a protective A gas nozzle, and an electric heating element is arranged in the extrusion die. The utility model can coat the surface of the wire rod with the amorphous alloy to improve the surface quality of the wire rod.

Description

Device for coating wire rods by multi-directional extrusion of amorphous alloys

technical field

The utility model relates to a device for continuously coating wire rods by multi-directional extrusion, and belongs to the technical field of amorphous metal cladding and forming.

Background technique

Metallic glasses, also known as amorphous alloys, have the advantages of metals and glasses while overcoming their respective disadvantages due to their unique disordered microstructure. Glass is fragile and has no ductility; but metallic glass is stronger than steel, harder than high-hard tool steel, and has certain toughness and rigidity. Therefore, people call metallic glass "unbreakable and unbreakable". The King of Glass". Amorphous alloys have good mechanical, physical and chemical properties such as high strength, high hardness, good wear resistance and corrosion resistance, which determine their wide application fields and broad application prospects.

Zirconium-based amorphous has lower requirements on the limit cooling rate, and a complete amorphous structure can be obtained at a cooling rate lower than 100K/s. Therefore, there are various forming processes for zirconium-based amorphous parts. Patent CN 102877010A "A casting method for zirconium-based bulk amorphous alloy castings" discloses a casting and forming method for zirconium-based bulk amorphous alloy castings. The at% of the chemical composition of the castings is: Zr 35-45 , Ti 11-16, Cu 10-15, Ni 8-12, Be 16-25. Before smelting, the above raw materials are purified by ultrasonic wave in alcohol medium, and then each is divided into two parts on average, according to their respective Density, from the bottom to the top, repeat the cloth into the crucible twice. When distributing the cloth, avoid the contact between the raw copper and the copper crucible to prevent the raw copper from bonding with the copper crucible when it is melted; then vacuumize the furnace and fill it with 0.05 MPa argon protection, start heating and smelting, keep at 60KW, 80KW, 120KW for 5 minutes, then increase the power to 140KW to make the temperature of the alloy melt reach above 800°C. Patent CN101164722 "A Net-shape Integrated Method for Preparation and Processing of Amorphous Alloy Workpieces" discloses an integrated method for net-shape preparation and processing of amorphous alloy workpieces. In the method of the invention, the alloy masterbatch is heated and melted and poured into a collapsible mold, the molten alloy is cooled to form an amorphous alloy, and the required workpiece can be obtained by simply cleaning the test piece after the mold is collapsed. The amorphous alloy workpiece of any complex shape with a critical thickness within a certain range is prepared by casting using a collapsible mold, realizing the integrated technology of preparation, processing and net shape of complex amorphous alloy workpieces. Patent CN 1199747C "A device and method for superplastic die forging of amorphous alloy precision parts" discloses a device for superplastic die forging of large amorphous alloy precision parts and the use of this device to prepare large pieces Process of amorphous alloy precision parts. It can form a variety of complex shape parts with an outer diameter of 0.1-100mm and a thickness of 0.1-50mm, such as gears, solid or solid stepped shafts (taper shafts) and equiaxed flat and thin parts. The invented device consists of three parts: a vacuum furnace, a replaceable pressure head and a mould. Patent CN 100473472C "Method for forming metallic glass" discloses a method for forming metallic glass. This method forms a molded product without surface defects while maintaining the amorphous nature of the metallic glass, and can easily form even thin-walled or unequal-thick molded products or complex-shaped molded products.

Amorphous alloys have high strength, high hardness, excellent wear resistance and corrosion resistance, and the surface is bright and beautiful, but the price of amorphous alloys is relatively high. Brass, steel, thermosetting plastics and other materials are much cheaper than amorphous alloys, but some of their physical and chemical properties are much worse than amorphous alloys. Since the amorphous alloy can be vitrified at 300-450°C and has excellent plasticity, the amorphous alloy can be coated on the surface of other materials, and the respective advantages of these materials can be comprehensively used to manufacture low-cost, high-efficiency Strength, high hardness, wear and corrosion resistant parts. By coating the outer surface of the corresponding parts with amorphous alloys, the surface quality, wear resistance and corrosion resistance of the parts can be improved, and the service life of the parts can be improved. The parts coated with amorphous alloys can also be used for other parts that cannot bear corrosive environment.

When covering wire or rod with amorphous alloy, if the wire or rod is covered by unidirectional extrusion process, the shunt chamber, welding chamber and forming chamber must be designed in the extrusion die , the structure of the mold is complex, the processing cost is high, and the extrusion force required is relatively large, and the life of the mold is relatively low.

Utility model content

The purpose of this utility model is to provide a device for coating wire rods through multi-directional extrusion of amorphous alloys, coating the surface of wire rods with amorphous alloys, improving the surface quality of wire rods, and making them have excellent durability. Corrosion and wear resistance, expand the application field of wire, prolong the service life of wire.

The technical scheme that the utility model takes is:

A device for coating wire rods through multi-directional extrusion of amorphous alloys, including wire rod supply devices, wire rod pulling and receiving devices, amorphous alloy billet operating systems, extrusion dies, extrusion punches, worktables, extrusion The pressing die is divided into the upper block of the extrusion die and the lower block of the extrusion die. The upper block of the extrusion die and the lower block of the extrusion die are respectively provided with a wire passage groove and a matching groove of the extrusion punch , the billet groove, the welding chamber groove and the forming chamber groove, when the two are put together, they can form a wire channel, an extrusion punch channel, a blank room, a welding room and a forming room, wherein the direction of the wire channel and the extrusion punch channel is vertical, The billet chamber and the channel of the extrusion punch are on the same line, the welding chamber, the forming room and the wire channel are on the same line, and there is a blank room and an extrusion punch channel on both sides of the wire channel, and the extrusion concave The upper block of the mold and the lower block of the extrusion die are fastened together, and an electric heating element and a temperature measuring device are arranged in the extrusion die, both of which are connected with a temperature controller.

The insulation material layer is coated around the extrusion die, and the entrance and exit of the extrusion punch and the wire rod are reserved at the corresponding positions of the insulation material layer.

The outlet of the wire channel is provided with a protective gas nozzle, the protective gas nozzle is connected to the oil-water separator through the gas storage tank, and the oil-water separator is connected to the vacuum pump through the gas compressor, and these constitute the cooling gas system.

The wire supply device, the wire pulling and collecting device, the extrusion die, and the extrusion punch are all arranged in the atmosphere box, and the atmosphere box is connected with a vacuum pump.

A heat insulation board is arranged between the extrusion die and the workbench.

The upper block of the extrusion die and the lower block of the extrusion die are fastened together by screws and pins.

The extrusion punch is connected with the plunger of the oil cylinder of the hydraulic system.

The unilateral gap between the wire channel and the wire is 0.02-0.04mm.

The blank chamber, welding chamber, forming chamber and the outer diameter shaping part of the pipe are located on the same part. The blank chamber and the welding chamber are round holes with the same radius as the outer diameter of the amorphous alloy blank. The forming chamber is connected to the welding chamber. The hemispherical structure communicated with the chamber, the outer diameter of the pipe is shaped like a round hole communicated with the forming chamber, and the overall structure of the extrusion die is simple. Between the corresponding two end surfaces of two cylindrical amorphous alloy blanks is the wire to be coated. When the temperature of the amorphous alloy reaches the crystallization temperature, plastic deformation will occur on the end surface of the cylindrical blank and the wire. The two blanks will plastically deform around the wire, and the two blanks will touch each other and be pressure welded together.

After the amorphous alloy billet is welded, it will hold the wire and flow to the forming chamber together, and finally extrude the extrusion die along the outer diameter of the pipe.

The process of using the above-mentioned device to coat the wire rod includes the following steps:

(1) Insert the wire rod into the wire rod channel in the extrusion die, and ensure that the wire rod is exposed from the exit of the extrusion die, and clamp the exposed wire rod end with a wire rod pulling and collecting device;

(2) Heating the upper block of the extrusion die and the lower block of the extrusion die by the electric heating element;

(3) Put several pieces of amorphous alloy blanks into the atmosphere box, start the vacuum pump to extract the air in the atmosphere box, the extracted gas is discharged into the atmosphere, and when the vacuum degree reaches 0.001Pa, turn off the vacuum pump;

(4) Open the shielding gas nozzle, and the shielding gas cools the wire rod outlet and the wire rod of the extrusion die by the shielding gas nozzle;

(5) Utilize the hydraulic system to control the plunger retreat of the oil cylinder, and extract the extrusion punch from the extrusion punch channel;

(6) The operating system for amorphous alloy blanks puts two pieces of amorphous alloy blanks into two blank chambers in the extrusion die respectively;

(7) Use the hydraulic system to control the extension of the plunger of the oil cylinder, insert the extrusion punch into the extrusion die, and compress the amorphous alloy billet through the extrusion punch;

(8) When the temperature of the extrusion die reaches above the glass transition temperature and keeps the temperature constant for 2 to 3 minutes, switch the hydraulic system to the extrusion mode, and transmit the pressure to the amorphous state through the plunger and the extrusion punch. Alloy billet; the amorphous alloy billet undergoes plastic flow and welding, and the wire coated with amorphous alloy is extruded through the wire outlet position of the extrusion die; during the coating process, the wire is applied by the traction and wire receiving device constant traction;

(9) If you want to continuously coat a large number of wires, go to step (5); after replacing the amorphous alloy blank, use the temperature and pressure to promote the diffusion of metal atoms through the pressure between the amorphous alloy interface, The amorphous alloy billets are welded together.

The beneficial effects of the utility model are:

(1) The extrusion die adopts a block structure, which changes the internal structure of the extrusion die into an external structure, which facilitates the processing of the extrusion die and is conducive to ensuring the processing accuracy and surface quality of the extrusion cavity; After the end, some remaining blanks will remain in the blank room, welding room and forming room, which is convenient for the removal of extrusion residues.

(2) Extract the inert gas in the atmosphere box through the vacuum pump, and then transport the inert gas extracted by the vacuum pump back to the protective gas system through the gas compressor, so as to realize the recycling and reuse of the protective gas and reduce the production cost; wire supply device, wire pulling and collection The devices are all set in the atmosphere box, which can not only protect the amorphous alloy from oxidation, but also realize continuous coating of the wire.

(3) During the extrusion process, the insulation material is coated around the extrusion die, and the positions of the extrusion punch and the wire inlet and outlet are reserved at the corresponding positions of the insulation material to avoid the heat transfer of the extrusion die too quickly into the atmosphere box.

(4) A heat shield is arranged between the extrusion die and the workbench to prevent the heat of the extrusion die from being transferred to the workbench too quickly.

(5) There is a protective gas nozzle at the outlet of the wire rod, and the high-pressure inert gas is provided through the cooling gas system, so that the temperature of the wire rod coated with amorphous alloy can be lowered to near room temperature as soon as possible, and the amorphous alloy coating layer can be avoided. In addition, the amorphous alloy coated on the surface of the wire is also cooled to avoid crystallization of the amorphous alloy coated on the surface of the wire.

(6) The extrusion die is only composed of an extrusion die and an extrusion punch, with simple structure, convenient maintenance and low processing cost.

(7) A traction and wire receiving device is installed in the tooling to reduce the flow resistance of the amorphous alloy in the forming chamber and speed up the speed of the wire covering the amorphous alloy; the traction and wire receiving device uses a constant force to The wire exerts traction.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model device;

Fig. 2 is the cross-sectional view of the mold part of the utility model device;

Fig. 3 is the front view of Fig. 2;

Figure 4 is a partially enlarged view of Figure 2;

Fig. 5 is the structural representation in the atmosphere box of the present utility model;

Fig. 6 exploded view of the mold part of the utility model device;

Fig. 7 is the assembly diagram of the mold part of the utility model device;

Fig. 8 is a schematic structural diagram of the cooling gas system.

Fig. 9 is a schematic diagram of the blank chamber, the welding chamber, the forming chamber and the shaping part of the outer diameter of the pipe;

Among them, 1. Screws, 2. Upper block of extrusion die, 3. Wire rod to be coated with amorphous alloy, 4. Lower block of extrusion die, 5 and 5a and 5b, extrusion punch, 6 . Amorphous alloy billet, 7. Protective gas nozzle, 8. Amorphous alloy coated on the surface of the wire rod, 9. Pin, 10. Electric heating element, 11. Temperature measuring device, 12. Extrusion die, 13 , wire supply device, 14, wire pulling and receiving device, 15a and 15b, oil cylinder, 16, temperature controller, 17, cooling gas system, 18, vacuum pump, 19, atmosphere box, 20, hydraulic system, 21, workbench, 22. Heat insulation board, 23. Thermal insulation material layer, 24. Gas compressor, 25. Oil-water separator, 26. Gas storage tank, 27. Pressure gauge.

Detailed ways

Further description will be given below in conjunction with specific embodiments and examples.

A device for coating wire rods by multidirectional extrusion of amorphous alloys, including a wire rod supply device 13, a wire rod pulling and collecting device 14, an amorphous alloy billet operating system, an extrusion die 12, an extrusion punch 5a and 5b, workbench 21, the extrusion die is divided into the upper block 2 of the extrusion die and the lower block 4 of the extrusion die, and the upper block 2 of the extrusion die and the lower block 4 of the extrusion die are respectively set There are wire passage grooves, extrusion punch matching grooves, blank grooves, welding chamber grooves and forming chamber grooves. When the two are combined, they can form wire passages, extrusion punch passages, blank chambers, welding chambers and forming chambers. The direction of the wire passage and the extrusion punch passage is vertical, the billet chamber and the extrusion punch passage are on the same line, the welding chamber, the forming chamber and the wire passage are on the same line, and there is a blank chamber on both sides of the wire passage And an extrusion punch channel, the upper block 2 of the extrusion die and the lower block 4 of the extrusion die are fastened together, and the electric heating element 10 and the temperature measuring device 11 are arranged in the extrusion die. Both are connected with temperature controller 16.

The insulation material layer 23 is coated around the extrusion die, and the entrance and exit of the extrusion punch and wire rod are reserved at the corresponding positions of the insulation material layer 23 .

The outlet of the wire channel is provided with a protective gas nozzle 7, the protective gas nozzle 7 is connected to the oil-water separator 25 through the gas storage tank 26, and the oil-water separator 25 is connected to the vacuum pump 18 through the gas compressor 24, and these constitute the cooling gas system.

The wire supply device 13 , wire pulling and collecting device 14 , extrusion die 12 , extrusion punches 5 a and 5 b are all arranged in an atmosphere box 19 connected to a vacuum pump 18 .

A heat insulation board 22 is arranged between the extrusion die and the workbench. The extrusion punch is connected with the plunger of the oil cylinder of the hydraulic system.

Cooling gas system, temperature control system, atmosphere box, vacuum pump, wire supply device, wire pulling and receiving device, extrusion die, hydraulic system and other parts are fastened on the workbench by screws; The accuracy of the pressing die avoids the separation of the two pieces of the extrusion die along the splicing surface due to the action of the extrusion force, and uses screws and pins to tighten the upper block of the extrusion die and the lower block of the extrusion die solid together.

An electric heating element and a temperature measuring device are arranged in the upper block of the extrusion die and the lower block of the extrusion die. The temperature controller controls the power supply of the electric heating element according to the temperature of the upper block of the extrusion die and the lower block of the extrusion die obtained by the temperature measuring device, so that the upper block of the extrusion die and the lower block of the extrusion die The temperature of the block is controlled within the required range.

In the upper block of the extrusion die and the lower block of the extrusion die, there are passages for wire rods that need to be coated with amorphous alloys. The unilateral gap between the passages and the wire rods is 0.02-0.04mm, which can ensure that the wire rods After passing through smoothly, the heat can be transferred to the wire through the extrusion die to preheat the wire.

Put an amorphous alloy billet in each of the two billet chambers, the size of the two billets is the same, and use the extrusion die to transfer heat to the amorphous alloy billet, thereby heating the amorphous alloy billet above the glass transition temperature . The hydraulic system provides hydraulic pressure for the oil cylinder, and the pressure is applied to the amorphous alloy billet through the extrusion punch. During the extrusion process, the pressure on the two extrusion punches is the same, so as to ensure that the two amorphous alloy billets are Extrusion deformation is carried out at the same speed. Two pieces of amorphous alloy billet are fused into one in the welding chamber and surround the wire rod, and the welded amorphous alloy billet and wire rod move to the forming chamber together, and are continuously extruded out of the forming chamber. During the wire coating process, the thickness of the amorphous alloy cladding layer is determined by the size of the forming chamber and the diameter of the wire.

The process of coating the wire by multi-directional extrusion of amorphous alloy is as follows:

(1) Insert the wire rod into the wire rod channel in the extrusion die, and ensure that the wire rod is exposed from the exit position of the forming chamber, and clamp the exposed wire rod end with the wire rod pulling and collecting device.

(2) The heating elements are used to heat the upper block of the extrusion die and the lower block of the extrusion die.

(3) Put several amorphous alloy billets into the atmosphere box, start the vacuum pump to extract the air in the atmosphere box, and discharge the extracted gas into the atmosphere, and when the vacuum degree reaches 0.001Pa, turn off the vacuum pump.

(4) Turn on the cooling gas system, and the gas passes through the protective gas nozzle to cool the wire rod outlet and the wire rod of the extrusion die; turn on the vacuum pump, and the protective gas extracted by the vacuum pump is sent to the gas compressor.

(5) Utilize the hydraulic system to control the plunger retreat of the oil cylinder, and extract the extrusion punch from the extrusion punch channel.

(6) Put two amorphous alloy billets into two billet chambers in the extrusion die respectively through the amorphous alloy billet operating system.

(7) Use the hydraulic system to control the extension of the plunger of the oil cylinder, insert the extrusion punch into the channel of the extrusion punch, and compress the amorphous alloy billet through the extrusion punch.

(8) When the temperature of the extrusion die reaches above the glass transition temperature and keeps the temperature constant for 2 to 3 minutes, switch the hydraulic system to the extrusion mode, and transmit the pressure to the amorphous state through the plunger and the extrusion punch. Alloy billet; the amorphous alloy billet undergoes plastic flow and welding, and the wire rod covered with amorphous alloy is extruded through the wire outlet position of the extrusion die; during the coating process, the wire rod is pulled and collected by the wire rod. Constant traction.

(9) If you want to continuously coat a large number of wires, go to step (5); after replacing the blank, through the pressure between the amorphous alloy interface, use temperature and pressure to promote the diffusion of metal atoms, and the amorphous state The alloy billets are welded together.

If the extrusion is over, close the protective gas system and stop the heating of the extrusion die; when the mold cools to around room temperature, cut off the wire coated with the amorphous alloy along the exit position of the extrusion die, and The mold is removed from the workbench; fastening parts such as screws are loosened, the extrusion die is disassembled, and the remaining amorphous alloy billet is removed; finally, the extrusion mold is assembled and fastened for the next use.

Example:

The material of the wire is copper wire with a diameter of 1 mm; the amorphous alloy coated on the outer layer of the copper wire is Zr58.5Cu15.6Ni12.8Al10.3Nb2.8. The glass transition temperature and crystallization temperature of the amorphous alloy Zr58.5Cu15.6Ni12.8Al10.3Nb2.8 are 385°C and 470°C respectively. When the heating temperature is 405°C, it can be kept for 30 minutes without crystallization. Meet the requirements of the coating process. When cladding the amorphous alloy, the heating temperature of the extrusion cylinder and the shaping sleeve is controlled at 403°C to 407°C by a temperature controller. The traction force used during cladding is 100N, and the thickness of the cladding amorphous alloy is 0.1mm. The protective gas is nitrogen.

Claims (8)

1. A device for coating wire rods through multi-directional extrusion of amorphous alloys, including wire rod supply devices, wire rod pulling and collecting devices, amorphous alloy billet operating systems, extrusion dies, extrusion punches, and workbenches , which is characterized in that the extrusion die is divided into an upper block of the extrusion die and a lower block of the extrusion die, and the upper block of the extrusion die and the lower block of the extrusion die are respectively provided with a wire channel groove, Extrusion punch matching groove, blank groove, welding chamber groove and forming chamber groove, when the two are put together, they can form wire channel, extrusion punch channel, blank chamber, welding chamber and forming chamber, among which wire channel, extrusion The channel direction of the punch is vertical, the blank chamber and the extrusion punch channel are on one line, the welding chamber, the forming room and the wire channel are on one line, and there is a blank room and an extrusion convex on both sides of the wire channel. Die channel, the outlet of the wire channel is provided with a protective gas nozzle, the upper block of the extrusion die and the lower block of the extrusion die are fastened together, and the electric heating element is arranged in the extrusion die , a temperature measuring device, both of which are connected with the temperature controller. 2. The device for coating wire rods by multidirectional extrusion of amorphous alloy according to claim 1, characterized in that the insulation material layer is coated around the extrusion die, and the corresponding layers of the insulation material layer The location is reserved for the entrance and exit of extrusion punches and wire rods. 3. The device for coating wire rods by multidirectional extrusion of amorphous alloys according to claim 1, wherein the protective gas nozzle is connected to the oil-water separator through the gas storage tank, and the oil-water separator passes through The gas compressor is connected with the vacuum pump. 4. The device for coating wire rods by multidirectional extrusion of amorphous alloys according to claim 1, 2 or 3, characterized in that the wire rod supply device, wire rod pulling and collecting device, extrusion concave The mold and the extrusion punch are all set in the atmosphere box, and the atmosphere box is connected with the vacuum pump. 5. The device for coating wire rods by multidirectional extrusion of amorphous alloys according to claim 1, 2 or 3, characterized in that a heat insulation plate. 6 . The device for coating wire rods by multi-directional extrusion of amorphous alloys according to claim 1 , wherein the extrusion punch is connected with a plunger of an oil cylinder of a hydraulic system. 7 . 7. The device for coating wire rods by multi-directional extrusion of amorphous alloys according to claim 1, characterized in that the unilateral gap between the wire rod channel and the wire rods is 0.02-0.04 mm. 8. The device for coating wire rods by multi-directional extrusion of amorphous alloy according to claim 1, characterized in that, the upper piece of the extrusion die and the lower piece of the extrusion die are passed through screws Fastened together with pins.