CN116475422A - Preparation method and equipment of copper-tungsten alloy electrical contact - Google Patents

Abstract

The invention provides a preparation method and equipment of a copper-tungsten alloy electrical contact, belonging to the technical field of metal powder manufacturing products; weighing: the prepared tungsten powder is filled into a stainless steel box, the tungsten powder is weighed by a drug balance, is put into glossy paper, is poured into a mould for pressing, and is prepared for copper tail to carry out the operation of the next working procedure; and (3) blank: and the pressed part and the copper tail car thereof reach the required specification. According to the invention, the hinge rod is arranged to move downwards to drive the hinge piece arranged on the positioning rod to generate lever offset force, one side of the hinge piece presses the compression spring and limits the movement direction of the hinge rod, when the first rotating tooth is meshed to drive the second rotating tooth to rotate, the second rotating tooth rotates to drive the rotating rod fixed in the second rotating tooth to rotate in the same direction, and then the cam on the surface of the rotating rod is driven to abut against the end part of the abutting rod, so that the positioning of the pressing piece when moving downwards is more accurate, and the hinge rod moves reversely to enable the compression spring to compress one end of the hinge piece to limit.

Description

Preparation method and equipment of copper-tungsten alloy electrical contact

Technical Field

The invention relates to the technical field of metal powder manufacturing products, in particular to a preparation method and equipment of a copper-tungsten alloy electrical contact.

Background

The electric contact material is used as contact material of electric switch, instrument and meter, and is responsible for the task of switching on and off current, so its performance directly affects the reliable operation and service life of electric switch and instrument and meter. The contact materials used at the present stage are usually pseudo alloys formed by compounding conductive metals (such as Ag, cu and the like) and reinforcing phase particles (such as W, WC, mo and the like), wherein the contact materials represented by AgW, agWC, cuW, cuWC and CuMo are produced by adopting a powder metallurgy infiltration process, and are widely applied to various low-voltage circuit breakers and contactors due to the characteristics of high burning loss resistance and the like.

In the preparation process of the copper-tungsten alloy electrical contact, an infiltration (infiltration) method is generally adopted to manufacture a W-Cu series electrical contact, the method can prepare an almost nonporous contact, the method is suitable for manufacturing high-voltage contact materials such as tungsten copper, tungsten silver, molybdenum silver, tungsten carbide silver, tungsten copper and the like, a skeleton with higher strength can be obtained by presintering the skeleton for re-infiltration, so that the contact is more resistant to arc burning, but the infiltration density in the infiltration process is generally 97% -98% of theoretical density, a very small amount of closed pores always exist in the sintered skeleton and cannot be filled with infiltration metal, an infiltration product cannot be fully dense, in addition, during cooling after long-time sintering infiltration, small holes formed by cooling solidification precipitation gas of the copper-tungsten alloy integral contact at a bonding interface of tungsten copper alloy and a copper end are formed, and interface pores are formed, and finally the pores remain in a product to be defects, so that the product tissue bonding strength is reduced.

Accordingly, the present application provides a method of making a copper tungsten alloy electrical contact to meet a need.

Disclosure of Invention

The invention aims to solve the technical problems that the prior small quantity of closed pores cannot be filled with infiltration metal, an infiltration product cannot be completely compact, gas is cooled and solidified to separate out small pores formed by gas at the bonding interface of tungsten-copper alloy and copper end, interface pores are formed, and finally the pores remain in the product to be defects, so that the problem of product tissue bonding strength is reduced.

In order to solve the technical problems, the invention provides the following technical scheme:

the preparation method of the copper-tungsten alloy electrical contact comprises the following steps:

weighing: the prepared tungsten powder is filled into a stainless steel box, the tungsten powder is weighed by a drug balance, is put into glossy paper, is poured into a mould for pressing, and is prepared for copper tail to carry out the operation of the next working procedure; and (3) blank: the pressed part and the copper tail car thereof reach the required specification; cleaning: taking one part of the part and the copper tail which are formed by pressing tungsten powder, brushing the part which is formed by pressing tungsten powder cleanly by using a hairbrush, and cleaning the joint surface of the copper tail by using a fluid medium; sintering: placing the part and copper tail formed by pressing tungsten powder in a crucible, adding chromium powder according to 0.5-1% of the mass of the copper tail, and preparing a copper-tungsten alloy electrical contact material by a vacuum infiltration method; and (3) heat treatment: carrying out high-temperature aging heat treatment on the sintered copper-tungsten alloy electrical contact material; and (3) forming: and (3) the material of the heat-treated copper-tungsten alloy electrical contact is fed to a preset specification, and is milled, packaged and put in storage.

The utility model provides a copper tungsten alloy electrical contact preparation facilities, includes the crucible, the top of crucible is equipped with the feed inlet, the supercharging subassembly is installed at the top of crucible, vacuum generator is installed to one side of crucible, the inside cover of crucible is equipped with interior crucible, the outside one end of interior crucible with the inboard end of crucible leaves the clearance, the viewing aperture is installed to one side of crucible.

Preferably, the supercharging assembly comprises a pressing part, a connecting part, a mounting frame and a pin shaft, wherein the top of the pressing part and the bottom of the connecting part are fixedly mounted, a temperature sensor for detecting the internal temperature of the inner crucible is mounted on the outer side of the pressing part, the top of the connecting part is mounted in a clamping manner on one side of the mounting frame, and the mounting frame is fixed to be inclined through the pin shaft.

Preferably, a first rotating tooth is rotatably arranged on one side of the pin shaft, a rotating rod is arranged on one side of the top of the crucible, a second rotating tooth is rotatably arranged on one side of the rotating rod, the second rotating tooth is meshed with the first rotating tooth, a supporting piece is arranged on one side of the mounting frame, the first rotating tooth and the supporting piece are coaxially arranged, and a buffer assembly is arranged on the top of the pressurizing assembly.

Preferably, the buffer assembly comprises a pore plate, a rotating rod, a rope wire and a hinging rod, wherein the pore plate is fixed between the supporting pieces, the top of each supporting piece is in a round hole shape, the rope wire penetrates through the round hole shape of the top of each supporting piece, two ends of the rope wire are wound on one end of the hinging rod respectively, and a compression spring is movably arranged at the top of the hinging rod.

Preferably, a positioning rod is fixed at one end of the top of the crucible, a hinge member is hinged to the surface of the positioning rod, the top of the compression spring is fixed to the bottom of one side of the hinge member, and a pushing rod is fixed to the other side of the hinge member.

Preferably, cams are sleeved on the surface of the rotating rod, the number of the pushing rods is multiple, the bottoms of the pushing rods are in butt joint with the outer side faces of the cams, and the number of the cams is matched with the number of the pushing rods.

Preferably, the inner chamber bottom of inner crucible is fixed with the jacking subassembly, the jacking subassembly includes wane, eccentric part and slide bar, the quantity of eccentric part is two sets of, the eccentric part with the slide bar is eccentric to be set up, the quantity of eccentric part and slide bar is two sets of, and follows the central line symmetry of wane sets up.

Preferably, a top moving block is hinged between the two groups of eccentric parts, the number of the top moving blocks is two, the two groups of top moving blocks are oppositely arranged, one side of each of the two groups of top moving blocks is of an arc-shaped structure, and the surface of one side of each of the two groups of top moving blocks is provided with a meshing groove.

Preferably, the first sliding plate and the second sliding plate are slidably mounted in the inner crucible, the first sliding plate and the second sliding plate are oppositely arranged, grooves matched with the tops of the two groups of pushing blocks are formed in the bottom of the first sliding plate, a collision piece is mounted on one side of the second sliding plate, and one side of the collision piece is abutted to one side of the warping plate.

Compared with the prior art, the invention has at least the following beneficial effects:

in the scheme, the copper-tungsten alloy electrical contact prepared by the scheme has accurate specification and size, the hardness, the conductivity, the arc resistance, the ablation resistance and the like of the copper-tungsten alloy are effectively improved to meet the requirements of customers, and meanwhile, the formation rate of holes is reduced through standard process operation.

The installation rack and the support piece which are installed on one side of the first rotating tooth are driven to overturn when the first rotating tooth rotates, the connecting piece which is installed on one side of the installation rack is driven to move linearly downwards, as shown in the figure, the connecting piece penetrates through the crucible and the top of the inner crucible to be connected with the top installation of the second sliding plate, the top of the second sliding plate is abutted to produce downward sliding in the inner crucible when the connecting piece moves downwards, the abutting piece which is fixed on the bottom of the second sliding plate produces the same-direction moving force, the end of one end of the abutting piece is abutted to the top of the rocker, the top moving block is driven to move upwards, the other group of top moving blocks are driven to move in the same direction through the eccentric sliding of the eccentric piece and the sliding rod, the first sliding plate slides in the inner crucible, the inner crucible is increased in pressure, the inner crucible is vacuumized by the vacuum generator, the first sliding plate and the second sliding plate are made to move oppositely, the inner pressure in the inner crucible is increased instantaneously, the copper mixture is pressed into the sintered copper, the copper mixture is sealed in the sealed hole, the sealed hole is formed in the sealed copper sealing process, the copper infiltration hole is formed in the sealed hole is formed, and the sealing hole is formed in the sealed copper sealing process, and the cooling hole is formed in the sealed hole is formed.

The hinge rod is arranged to move downwards to drive the hinge piece arranged on the positioning rod to generate lever offset force, one side of the hinge piece presses the compression spring and limits the movement direction of the hinge rod, when the first rotating teeth are meshed to drive the second rotating teeth to rotate, the second rotating teeth rotate to drive the rotating rod fixed in the second rotating teeth to rotate in the same direction, the cam on the surface of the rotating rod is driven to abut against the end part of the moving rod, the hinge force and the hinge angle of the hinge piece are increased, and then the positioning of the compression piece when moving downwards is more accurate, and the hinge rod moves reversely to enable one end of the compression spring to compress the hinge piece to limit.

The abutting piece fixed at the bottom of the second sliding plate generates a equidirectional moving force, the end part of one end of the abutting piece is abutted against the top of the seesaw, the jacking block is driven to upwards generate jacking movement, the other group of jacking blocks are driven to generate equidirectional movement through the eccentric sliding of the eccentric piece and the sliding rod, and the jacking block is abutted against the top of the first sliding plate, so that the first sliding plate slides in the inner crucible, the pressure inside the inner crucible is increased, the vacuum generator is used for vacuumizing the inner crucible, the first sliding plate and the second sliding plate are intermittently pressed in opposite directions, the pressure inside the inner crucible is increased instantaneously, the mixture is sealed to the holes of the tungsten-copper alloy during sintering in a flowing mode, the mixture is pressed into the holes to seal the holes to be filled with infiltration metal, and then the vacuum infiltration effect is improved.

Drawings

The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the disclosure and to enable a person skilled in the pertinent art to make and use the disclosure.

FIG. 1 is a schematic diagram of the overall perspective structure of a crucible for a method for manufacturing a copper-tungsten alloy electrical contact;

FIG. 2 is a schematic diagram of a side view broken perspective structure of a crucible of a copper tungsten alloy electrical contact manufacturing method;

FIG. 3 is an enlarged perspective view of the structure shown at A in FIG. 2;

FIG. 4 is an enlarged schematic perspective view of a supercharging assembly;

FIG. 5 is a schematic view of the enlarged perspective view of FIG. 4 at B;

FIG. 6 is a schematic diagram of a side view and three-dimensional enlarged structure of a cushioning assembly;

FIG. 7 is a schematic view of a three-dimensional enlarged structure of a jacking assembly

FIG. 8 is a schematic illustration of a press formed part and its copper tail stock gauge;

FIG. 9 is a schematic diagram of a specification of a blank of heat treated copper tungsten alloy electrical contact material;

fig. 10 is a schematic diagram of a milling groove and flaw detection specification.

[ reference numerals ]

1. A crucible; 2. a feed inlet; 3. a pressurizing assembly; 4. a vacuum generator; 5. a jacking assembly; 6. a first sliding plate; 7. an inner crucible; 8. a second sliding plate; 9. an observation port; 10. a buffer assembly; 31. a pressing member; 32. a connecting piece; 33. a mounting frame; 34. a pin shaft; 35. a first rotating tooth; 36. a support; 37. a second rotating tooth; 51. a seesaw; 52. an eccentric member; 53. a slide bar; 54. a top moving block; 101. an orifice plate; 102. a rotating lever; 103. rope wires; 104. a hinge rod; 105. a pushing rod; 106. a compression spring; 107. a hinge.

Description of the embodiments

The invention provides a preparation method and equipment of a copper-tungsten alloy electrical contact, and the preparation method and equipment are described in detail below with reference to the accompanying drawings and specific embodiments. While the invention has been described herein in terms of the preferred and preferred embodiments, the following embodiments are intended to be more illustrative, and may be implemented in many alternative ways as will occur to those of skill in the art; and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the invention specifically.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Generally, the terminology may be understood, at least in part, from the use of context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. In addition, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on the context, allow for other factors that are not necessarily explicitly described.

It will be understood that the meanings of "on … …", "over … …" and "over … …" in this disclosure should be interpreted in the broadest sense so that "on … …" means not only "directly on" but also includes meaning "directly on" something with intervening features or layers therebetween, and "over … …" or "over … …" means not only "on" or "over" something, but also may include its meaning "on" or "over" something without intervening features or layers therebetween.

Furthermore, spatially relative terms such as "under …," "under …," "lower," "above …," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.

The embodiment of the invention provides a preparation method of a copper-tungsten alloy electrical contact, which comprises the following steps:

weighing: the method comprises the steps of taking prepared tungsten powder, placing tungsten powder into a glossy paper, pouring the glossy paper into a mould for pressing, preparing copper tails for the next procedure, taking the tungsten powder as CuW70 powder, placing 520g of the CuW70 powder into the glossy paper by using a drug balance (1000 g), pouring the CuW70 powder into the glossy paper, and pressing the glossy paper by using a mould, wherein the mechanical pressure value is more than or equal to 90T so as to prevent dislocation deformation of a formed part caused by overlarge mechanical pressure, and the first three pieces of test density of 11.95-12.05g/cm of each pressing ensure the consistency of the density and the qualification rate of the products in the early processing, and the method is remarkable in that the third piece of test density of each 100 pieces of products is obtained for preventing the occurrence of defective products in batch production; checking whether the balance is balanced, whether the die is intact, and preparing a limiting block and a demoulding horseshoe; the CuW70 powder is carefully thrown when being carried, and the product is taken and put lightly after being pressed out, so that unfilled corners and edges cannot be removed, and oil stains cannot be generated; the pressed product was measured by checking the product size or visual appearance quality with a three-way vernier caliper (150 cm).

And (3) blank: the pressed part and the copper tail car thereof reach the required specification (for example, shown in fig. 8), the operation of a lathe is checked before the pressed part is turned, the clamping force of a three-jaw chuck is proper, firm and correctly positioned, the oil injection and wiping of all parts of the lathe are clean to prevent other impurities from being mixed in the parts, the stability of the product is reduced, the product is clamped by a special soft jaw, the clamping force is proper, the product is tightly fixed on a three-jaw positioning table, the rotating speed of the lathe is 300-500 revolutions per minute, the maximum turning amount is 6mm, and the feeding speed F0.2; when the copper tail is used, the blanking Qcr0.5 size is phi 45 x 90+1, the end face is turned by a turning tool with 45 degrees, and the phi 28 drill bit is drilled for operation, and the method is remarkable in that whether the lathe runs normally or not is checked before the copper tail is carried out, the clamping force of a three-jaw chuck is proper, firm and correctly positioned, oil is injected and wiped at each part of the lathe to prevent other impurities from being mixed in the three-jaw chuck, the finished product is used for not more than 48 hours, if the time limit is exceeded, the turning face must be polished newly, the rotating speed of the lathe is 800-1000 revolutions per minute, the maximum turning quantity is 4mm, and the feeding speed F0.3.

Wherein, the part of compression moulding is car to the specification that needs is:

inner hole diameter (mm)	φ13
		Maximum outer diameter (mm)	φ40
Length (mm)	40
		Diameter of positioning shaft (mm)	φ28
Positioning shaft length (mm)	8

Wherein, copper tail car is to the specification that needs:

maximum outer diameter (mm)	φ40
		Length (mm)	90
PositioningDiameter of hole (mm)	φ28
		Positioning hole length (mm)	3

Cleaning: taking one part of the part and the copper tail which are formed by pressing tungsten powder, brushing the part which is formed by pressing tungsten powder cleanly by using a hairbrush, cleaning the joint surface of the copper tail by using a fluid medium, wherein the fluid medium is 120# gasoline;

sintering: placing a part formed by pressing tungsten powder and a copper tail in a crucible (1), adding chromium powder according to 0.5-1% of the mass of the copper tail, and preparing a copper-tungsten alloy electrical contact material by a vacuum infiltration method;

and (3) heat treatment: carrying out high-temperature aging heat treatment on the sintered copper-tungsten alloy electrical contact material, wherein the quenching temperature of the heat conversion treatment is 980 DEG+10 DEG, preserving heat for one hour, the aging temperature is 480 DEG+10 DEG, preserving heat for 4 hours, cooling to below 300 ℃ along with the furnace, discharging, and checking by using a vernier caliper or a Brinell hardness tester with the quenching hardness HB being more than or equal to 110;

and (3) forming: the method comprises the steps of feeding a material of a heat-treated copper-tungsten alloy electrical contact to a preset specification (shown in figure 9 for example), milling, packaging and warehousing, so that the hardness, conductivity, arc resistance, ablation resistance and other performances of the copper-tungsten alloy meet the product requirements, aligning a tungsten head by utilizing a numerical control lathe clamp Qcr0.5 part of excircle, turning around to clamp the copper-tungsten part to ensure the total length of 88+/-0.2, and notably ensuring the coaxiality by using a special soft claw to clamp a copper tail, ensuring the copper-tungsten length to be more than or equal to 30 when the copper-tungsten end face is flattened, and not injecting a round angle R3, wherein the shape and position tolerance is checked by a 0-125 vernier caliper, an inside micrometer, a 25-50 micrometer and a 0-200 depth micrometer or a special test bench;

wherein, the copper tungsten alloy electrical contact material subjected to heat treatment is fed to the preset specification:

inner hole diameter (mm)	The diameter of the inner hole is conical, the minimum diameter phi 17 and the maximum diameter phi 30
		Diameter of excircle (mm)	The outer circle is conical, the minimum diameter phi 33 and the maximum diameter phi 40
Length (mm)	88

In this embodiment, as shown in fig. 10, the milling and grooving is performed by using a milling machine, the special milling tool is clamped by using a dividing head, the product is loaded into the special purpose, the milling tool is propped against by using a tail seat of the dividing head, the milling blade is used for feeding evenly, the milling machine cooling liquid is opened, the milling machine is clamped after milling, burrs are removed, R1.5 at 12 positions are ensured, and it is worth noting that the surface of the product cannot be scratched, polished, subjected to dye check, and detected by using a 0-125 vernier caliper and a 25-50 micrometer.

In this embodiment, a copper tungsten alloy electrical contact preparation equipment as shown in fig. 1 to 3 comprises a crucible 1, wherein a feed inlet 2 is arranged at the top of the crucible 1, a pressurizing assembly 3 is arranged at the top of the crucible 1, a vacuum generator 4 is arranged on one side of the crucible 1, a pressure gauge and an electromagnetic valve are arranged on one side of the vacuum generator 4 and used for checking the pressure value generated by the vacuum generator 4, cutting off or pressure compensation is performed through the electromagnetic valve, an inner crucible 7 is sleeved in the crucible 1, a gap is reserved between one end of the outer side of the inner crucible 7 and the inner side end of the crucible 1, and an observation port 9 is arranged on one side of the crucible 1.

In this embodiment, as shown in fig. 3 to 6, the pressurizing assembly 3 includes a pressing member 31, a connecting member 32, a mounting frame 33 and a pin 34, the top of the pressing member 31 and the bottom of the connecting member 32 are fixedly installed, a temperature sensor for detecting the internal temperature of the inner crucible 7 is installed on the outer side of the pressing member 31, the temperature sensor is not described in detail in the protection scope of the present invention, the top of the connecting member 32 and one side of the mounting frame 33 are clamped and installed, the purpose of the pressurizing assembly is to quickly install and detach the temperature sensor, the maintaining is convenient, the mounting frame 33 is fixed in an inclined shape by the pin 34, one side of the pin 34 is rotatably installed with a first rotating tooth 35, one side of the top of the crucible 1 is installed with a rotating rod 102, one side of the rotating rod 102 is rotatably installed with a second rotating tooth 37, the second rotating tooth 37 is meshed with the first rotating tooth 35, one side of the mounting frame 33 is installed with a supporting member 36, the first rotating tooth 35 and the supporting member 36 are coaxially arranged, and the top of the pressurizing assembly 3 is provided with a buffer assembly 10.

In this embodiment, as shown in fig. 4 to 6, the buffer assembly 10 includes an orifice plate 101, a rotating rod 102, a rope 103 and a hinge rod 104, the orifice plate 101 is fixed between the supporting members 36, the top of the supporting members 36 is in a round hole shape, the rope 103 passes through the inside of the round hole shape at the top of the supporting members 36, two ends of the rope 103 are respectively wound around one end of the hinge rod 104, a compression spring 106 is movably mounted at the top of the hinge rod 104, a positioning rod is fixed at one end of the top of the crucible 1, a hinge piece 107 is hinged on the surface of the positioning rod, the top of the compression spring 106 is fixed at the bottom of one side of the hinge piece 107, a pushing rod 105 is fixed at the other side of the hinge piece 107, cams are sleeved on the surface of the rotating rod 102, the pushing rods 105 are in multiple groups, the bottoms of the pushing rods 105 are abutted against the outer side surfaces of the cams, and the number of the cams are matched with the number of the pushing rods 105.

In this embodiment, as shown in fig. 4 to 6, the first rotating teeth 35 are driven, the engagement drives the second rotating teeth 37 to rotate, the first rotating teeth 35 rotate to drive the mounting frame 33 and the supporting member 36 mounted on one side of the first rotating teeth 35 to turn over, and then drive the connecting member 32 mounted on one side of the mounting frame 33 to move linearly downward, the supporting member 36 drives the orifice plate 101 mounted on one side of the supporting member 36 to turn over in the process of turning over, the orifice plate 101 turns over to incline to one side, the rope wire 103 positioned in the circular hole at the top of the orifice plate 101 is pulled to generate downward force, and then the hinging rod 104 fixed on two sides of the rope wire 103 is driven to generate equidirectional movement, wherein the top of the hinging rod 104 is fixed with one end of the hinging member 107, and one side of the hinging member 107 is driven to generate lever offset force when the hinging rod 104 generates downward movement, the compressing spring 106 is pressed on one side of the hinging member 107 and limits the movement direction of the hinging rod 104, and when the first rotating teeth 35 engage and drive the second rotating teeth 37 to rotate, the second rotating teeth 37 rotate to drive the second rotating teeth 37 to rotate to generate downward force to drive the hinging rod 102 fixed on the two sides of the hinging rod 102 to rotate to move to the hinging rod 102, and then the hinging rod 102 is driven to move to rotate to the hinging rod 102 more accurately and the hinging rod 102 to move downward to the hinging rod 102.

In this embodiment, as shown in fig. 3 and 7, the jacking component 5 is fixed at the bottom of the inner cavity of the inner crucible 7, the jacking component 5 includes a rocker 51, an eccentric part 52 and a sliding rod 53, the number of the eccentric parts 52 is two groups, the eccentric parts 52 and the sliding rod 53 are eccentrically arranged, the number of the eccentric parts 52 and the sliding rod 53 is two groups, the two groups of eccentric parts 52 are symmetrically arranged along the center line of the rocker 51, a jacking block 54 is hinged between the two groups of eccentric parts 52, the number of the jacking blocks 54 is two groups and oppositely arranged, one side of the two groups of jacking blocks 54 is in an arc-shaped structure, the surface of one side is provided with an engagement groove, the two groups of jacking blocks 54 are engaged when falling back, the positioning of the jacking blocks 54 is increased, the first sliding plate 6 and the second sliding plate 8 are slidably arranged in the inner crucible 7, the bottoms of the first sliding plate 6 and the second sliding plate 8 are oppositely arranged, the grooves matched with the tops of the two groups of jacking blocks 54 are arranged, one side of the second sliding plate 8 is provided with one side of the abutting piece, and one side of the abutting piece is abutted against one side of the rocker 51.

In this embodiment, as shown in fig. 1 to 7, the first rotating teeth 35 rotate to drive the mounting frame 33 and the supporting member 36 mounted on one side of the first rotating teeth 35 to turn over, and further drive the connecting member 32 mounted on one side of the mounting frame 33 to move linearly downward, as shown in fig. 3, the connecting member 32 passes through the crucible 1 and the top of the inner crucible 7 to connect with the top of the second sliding plate 8, when the connecting member 32 moves downward, the top of the second sliding plate 8 is abutted to produce downward sliding in the inner crucible 7, the abutting member fixed on the bottom of the second sliding plate 8 produces a same-direction moving force, and the end of one end of the abutting to the top of the seesaw plate 51, and further drives the other group of the jacking blocks 54 to move upward through the eccentric sliding of the eccentric member 52 and the sliding rod 53, and the top of the first sliding plate 6 is further slid in the inner crucible 7, the pressure in the inner crucible 7 is increased, the inner crucible 7 is pumped by the vacuum generator 4 to pump the inner crucible 7 to produce a same-direction moving force, and the inner crucible 8 is sealed by the intermittent sliding of the first sliding plate, and the inner crucible 7 is further sealed by the pressure, and the inner capillary holes of the inner crucible 7 are filled with the metal alloy, and the pores are sealed by the intermittent sealing effect.

The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention. In the above description of the preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will fully be understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present invention.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the methods of the embodiments described above may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as: ROM/RAM, magnetic disks, optical disks, etc.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (10)

1. The preparation method of the copper-tungsten alloy electrical contact is characterized by comprising the following steps of:

weighing: the prepared tungsten powder is filled into a stainless steel box, the tungsten powder is weighed by a drug balance, is put into glossy paper, is poured into a mould for pressing, and is prepared for copper tail to carry out the operation of the next working procedure;

and (3) blank: the pressed part and the copper tail car thereof reach the required specification;

cleaning: taking one part of the part and the copper tail which are formed by pressing tungsten powder, brushing the part which is formed by pressing tungsten powder cleanly by using a hairbrush, and cleaning the joint surface of the copper tail by using a fluid medium;

sintering: placing the part and copper tail formed by pressing tungsten powder in a crucible, adding chromium powder according to 0.5-1% of the mass of the copper tail, and preparing a copper-tungsten alloy electrical contact material by a vacuum infiltration method;

and (3) heat treatment: carrying out high-temperature aging heat treatment on the sintered copper-tungsten alloy electrical contact material;

and (3) forming: and (3) the material of the heat-treated copper-tungsten alloy electrical contact is fed to a preset specification, and is milled, packaged and put in storage.

2. The utility model provides a copper tungsten alloy electrical contact preparation equipment, its characterized in that includes the crucible, the top of crucible is equipped with the feed inlet, the supercharging assembly is installed at the top of crucible, vacuum generator is installed to one side of crucible, the inside cover of crucible is equipped with the inner crucible, the outside one end of inner crucible with the inboard end of crucible leaves the clearance, the viewing aperture is installed to one side of crucible.

3. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 2, wherein the pressurizing assembly comprises a pressing member, a connecting member, a mounting frame and a pin shaft, the top of the pressing member and the bottom of the connecting member are fixedly mounted, a temperature sensor for detecting the internal temperature of the inner crucible is mounted on the outer side of the pressing member, the top of the connecting member and one side of the mounting frame are mounted in a clamping manner, and the mounting frame is fixed to be inclined through the pin shaft.

4. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 3, wherein a first rotating tooth is rotatably mounted on one side of the pin shaft, a rotating rod is mounted on one side of the top of the crucible, a second rotating tooth is rotatably mounted on one side of the rotating rod, the second rotating tooth is meshed with the first rotating tooth, a supporting piece is mounted on one side of the mounting frame, the first rotating tooth and the supporting piece are coaxially arranged, and a buffer assembly is arranged on the top of the pressurizing assembly.

5. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 4, wherein the buffer component comprises a pore plate, a rotating rod, a rope wire and a hinging rod, the pore plate is fixed between the supporting pieces, the top of the supporting pieces is in a round hole shape, the rope wire penetrates through the round hole-shaped inner part of the top of the supporting pieces, two ends of the rope wire are wound around one end of the hinging rod respectively, and a compression spring is movably mounted at the top of the hinging rod.

6. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 5, wherein a positioning rod is fixed at one end of the top of the crucible, a hinge member is hinged to the surface of the positioning rod, the top of the compression spring is fixed to the bottom of one side of the hinge member, and a pushing rod is fixed to the other side of the hinge member.

7. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 6, wherein cams are sleeved on the surface of the rotating rod, the number of the pushing rods is multiple, the bottoms of the pushing rods are in butt joint with the outer side faces of the cams, and the number of the cams is matched with the number of the pushing rods.

8. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 2, wherein a jacking component is fixed at the bottom of an inner cavity of the inner crucible and comprises two groups of eccentric pieces and two groups of sliding rods, and the eccentric pieces and the sliding rods are arranged eccentrically and symmetrically along the center line of the rocker.

9. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 8, wherein two groups of eccentric pieces are hinged with a top moving block, the number of the top moving blocks is two, the two groups of top moving blocks are oppositely arranged, one side of each of the two groups of top moving blocks is of an arc-shaped structure, and the surface of one side of each of the two groups of top moving blocks is provided with an engagement groove.

10. The copper-tungsten alloy electrical contact manufacturing equipment according to claim 9, wherein a first sliding plate and a second sliding plate are slidably mounted in the inner crucible, the first sliding plate and the second sliding plate are oppositely arranged, grooves matched with the tops of the two groups of top moving blocks are formed in the bottom of the first sliding plate, a collision piece is mounted on one side of the second sliding plate, and one side of the collision piece is in contact with one side of the seesaw.