A titanium alloy socket for copper contact members

Abstract

The application discloses a kind of titanium alloy socket of copper contact piece glass burning, glass insulator, pin contact piece and socket shell are sintered into glass burning assembly by glass burning process, pin contact piece is made of copper expansion alloy material, its expansion coefficient is 8.0×10 ‑6 / K~10.0×10 ‑6 / K, melting temperature is above 2000 DEG C, socket shell is made of titanium alloy material, its expansion coefficient is 8.0×10 ‑6 / K~10.0×10 ‑6 / K, the expansion coefficient of glass powder of glass insulator is 5.0×10 ‑6 / K~7.0×10 ‑6 / K.It is realized that titanium alloy shell, glass insulator and pin contact piece are sintered, and glass burning assembly has reliable axial sealing performance;Pin contact piece uses copper expansion alloy material, not only improves product electrical performance, but also reduces product size, makes product miniaturization and light weight;Socket adopts three O-shaped sealing ring sealing structure, with high reliability, long service life installation sealing.

Description

Technical Field

[0001] The invention relates to an underwater sealed connector, in particular to a titanium alloy socket with a glass-sintered copper contact piece. Background Art

[0002] With the rapid development of the shipbuilding industry, the requirements for the electrical performance and sealing performance of watertight connectors are increasing day by day. Traditional titanium alloy watertight connector sockets or receptacles are not glass-fired, and non-glass-fired sockets or receptacles do not have axial sealing. Once the outer seal of the socket or receptacle mating surface fails and leaks, since the socket or receptacle does not have axial water sealing, water will directly enter or enter the interior of the equipment through the watertight cable. The equipment cannot operate normally or even sinks due to excessive water ingress, causing loss of personnel and internal equipment in the cabin. Traditional watertight connectors are designed with 2 or 1 O-rings for sealing at the mating end and the installation end. The watertight sealing life is relatively short and the sealing reliability is relatively low. It is difficult to use in areas with high water sealing requirements and where long equipment life is required. The fewer the number of sealing rings, the greater the probability of failure as the service time increases, and the greater the risk faced by personnel and internal equipment in the cabin. Traditional glass-fired connectors use iron-nickel expansion alloy or Kovar alloy as the pins for glass sintering. Figure 1 The product's pin material is Kovar alloy, which has poor electrical properties compared to copper expansion alloy. The main manifestations are low current carrying capacity, high temperature rise (high heat generation), and high contact resistance. In addition, iron-nickel expansion alloy or Kovar alloy materials are magnetic, which can easily affect the normal use of precision equipment and instruments.

[0003] The current carrying capacity, temperature rise (heat generation), and contact resistance of a connector are primarily determined by the material properties of the contacts. The compatibility of the material expansion coefficients between glass-fired connector parts (housing, pins, glass mounting plate), the glass-fired process, and the subsequent coating process all affect the product's insulation resistance under normal conditions.

[0004] Currently, connector pins in the industry utilize conventional and proven materials such as pure copper, bronze, and brass, as well as iron-nickel expansion alloys and Kovar. Connector pins that don't require glass sintering use pure copper or copper alloys like bronze and brass, while connector pins that require glass sintering use iron-nickel expansion alloys and Kovar. The key challenge in choosing the right material for connector pins, rather than pure copper or copper alloys like bronze and brass, lies in the compatibility of the pin material with the glass powder and glass sintering process.

[0005] The conventional and mature glass sintering process used in the titanium alloy watertight connector field is a "high-temperature sintering process." The product generally consists of pins, a glass mounting plate, and a housing, which are sintered in a sintering furnace at temperatures between 940°C and 1000°C. At the highest temperature, the pins and housing must remain molten, while the glass must melt. The molten glass, pins, and housing are then integrated into a glass-sintered assembly. The glass-sintered assembly then undergoes a conventional coating process, with the pins plated with gold to create the finished glass-sintered product. The finished product must demonstrate reliable water pressure resistance and meet insulation resistance requirements. The industry's lack of glass-sintering technology for copper pin contacts stems from the difficulties in selecting the pin contact material, the choice of glass powder, and the appropriate glass-sintering technology.

[0006] Here are the reasons:

[0007] 1) If the connector uses a conventional and proven high-temperature sintering process, the sintering temperature is generally between 940°C and 1000°C. The melting temperature of pure copper is approximately 1083°C, while copper alloys such as bronze and brass melt between 700°C and 800°C. Iron-nickel expansion alloys or Kovar melt above 1400°C, and titanium alloys melt above 1600°C. Pins made of pure copper or copper alloys will soften or even melt during high-temperature sintering, while iron-nickel expansion alloys or Kovar do not. Once the pin material softens, it deforms, losing its size and shape. Once melted, the pin ceases to exist.

[0008] 2) If pure copper or copper alloy materials are to be used for glass sintering without softening, a low-temperature sintering process is required. The sintering temperature is generally between 400℃ and 600℃. Pure copper or copper alloy materials will not melt, so a matching low-temperature sintered glass is required. The glass of the glass-sintered components after conventional low-temperature glass sintering is not resistant to subsequent coating processes. In water or acid-base coating solutions, part of the glass will dissolve in the coating liquid, and the quality cannot be controlled, which will lead to defects such as unreliable water pressure resistance and reduced insulation resistance. The quality and reliability of the sintered products are greatly reduced.

[0009] With the increasing use of connectors, especially underwater connectors, higher requirements are being placed on their electrical performance. Existing iron-nickel expansion alloys or Kovar alloys have strong magnetism, which can affect the proper operation of certain high-precision equipment and instruments, causing magnetic interference. To address these electrical and magnetic interference issues in underwater connectors, the inventors, after extensive research, identified a high-temperature-resistant copper expansion alloy for the pins and a titanium alloy for the housing. However, the sealing and electrical performance of the glass-sintered assemblies sintered using these materials using existing glass-sintering processes did not meet the connector requirements. The inventors' extensive research revealed the following reasons for these substandard glass-sintered assemblies: 1. The expansion coefficient of the contact material does not match that of the existing glass powder. This mismatch in expansion coefficients leads to inconsistent shrinkage during the final cooling stage of the sintering process, resulting in cracks between the glass and metal. This not only affects sealing performance and causes water or air leaks, but also reduces the insulation resistance of the product, potentially even failing to meet the required standards. 2. Incomplete wax removal results in bubbles inside and on the surface of the sintered glass, resulting in substandard insulation performance. 3. The glass blank exhibits significant deformation, making assembly impossible. Summary of the Invention

[0010] The object of the present invention is to overcome the disadvantages of the prior art and provide a titanium alloy socket with glass-sintered copper contacts.

[0011] The objectives of the present invention are achieved through the following technical solutions: a titanium alloy socket with glass-fired copper contacts, comprising a glass insulator, a pin contact, and a socket shell. The glass insulator, the pin contact, and the socket shell are sintered into a glass-fired assembly through a glass-fired process, and the inner cavity of the socket shell is divided into two cavities by the glass insulator. A first mounting plate is installed in one cavity, one end of the pin contact passes through the first mounting plate, and the first mounting plate abuts the glass insulator. A second mounting plate is installed in the other cavity, the other end of the pin contact passes through the second mounting plate, and the second mounting plate abuts the glass insulator. The pin contact is made of a copper expansion alloy material with an expansion coefficient of 8.0×10 -6 / K~10.0×10 -6 / K, the melting temperature is above 2000℃, the socket shell is made of titanium alloy, and its expansion coefficient is 8.0×10 -6 / K~10.0×10 -6 / K, the expansion coefficient of the glass powder of the glass insulator is 5.0×10 -6 / K~7.0×10 -6 / K, the sintering process of glass sintered components includes the following steps:

[0012] S1: Pressing glass blanks: Put the selected glass powder into a blank pusher and press the glass powder according to the size and weight of the glass insulator to obtain a glass blank;

[0013] S2: Dewaxing: Use roving gloves to place the plate with the glass blanks on the mesh belt dewaxing vitrification furnace for dewaxing. The dewaxing step temperature ranges from room temperature to 550°C, and the dewaxing time is 40h to 48h.

[0014] S3: Vitrification: Place the waxed glass blank in a mesh belt vitrification furnace for vitrification. The vitrification step temperature ranges from room temperature to 730°C, and the total vitrification time is 12-16 hours.

[0015] S4: Assembling, fixing the vitrified glass blank with a graphite mold, and then assembling the pin contact parts, the housing and the glass blank together to form a component to be sintered;

[0016] S5: Sintering: placing the assembled components to be sintered in a sintering furnace at a sintering temperature of 940°C to 1100°C for a sintering time of 15 min to 60 min;

[0017] S6: demolding, disassembling the graphite mold to obtain a sintered component.

[0018] Optionally, in step S2, when removing wax, the mesh belt wax removal vitrification furnace is first heated to 240℃~260℃, and the holding time is 6h~7h, and then heated to 300℃~330℃, and the holding time is 22h~24h, and then heated to 380℃~400℃, and the holding time is 4h~5h, and then heated to 420℃~450℃, and the holding time is 2h~3h, and then heated to 480℃~520℃, and the holding time is 2h~3h, and then heated to 530℃~550℃, and the holding time is 4h~6h.

[0019] Optionally, in step S3, the mesh belt vitrification furnace is first heated to 240℃~260℃, with a holding time of 1.2h~1.6h, and then heated to 300℃~330℃, with a holding time of 3.6h~4.8h, and then heated to 400℃~470℃, with a holding time of 1.2h~1.6h, and then heated to 500℃~550℃, with a holding time of 1.2h~1.6h, and then heated to 620℃~650℃, with a holding time of 1.2h~1.6h, and then heated to 690℃~730℃, with a holding time of 2.4h~3.2h.

[0020] Optionally, the glass blank is vitrified four times, and the glass blank must be turned over after each vitrification. The highest temperature of the step temperature for each vitrification is adjusted by ±3°C according to the shape of the glass out of the furnace. During each vitrification, the mesh belt vitrification furnace is first heated to 240°C~260°C, and the holding time is: 0.3h~0.4h, and then heated to 300°C~330°C, and the holding time is: 0.9h~1.2h, and then heated to 400°C~470°C, and the holding time is: 0.3h~0.4h, and then heated to 500°C~550°C, and the holding time is: 0.3h~0.4h, and then heated to 620°C~650°C, and the holding time is: 0.3h~0.4h, and then heated to 690°C~730°C, and the holding time is: 0.6h~0.8h.

[0021] Optionally, a convex ring is provided on the socket housing, an annular sealing groove is provided on the side wall of the convex ring, and a first sealing ring is installed in the annular sealing groove.

[0022] Optionally, two sealing grooves are provided on the outer circle of the socket housing at one end close to the first sealing ring, and the second sealing ring is installed in each of the sealing grooves.

[0023] Optionally, a third sealing ring is installed on the outer end surface of the socket housing away from the first sealing ring.

[0024] The present invention has the following advantages:

[0025] 1. The glass-sintered component sintering process is adopted to realize the sintering of titanium alloy shell, glass insulator and pin contact parts, and the glass-sintered component has reliable axial sealing performance.

[0026] 2. The pin contacts are made of copper expansion alloy, which not only improves the electrical performance of the product, but also reduces the size of the product, making it miniaturized and lightweight.

[0027] 3. The socket adopts three O-rings for sealing structure, which has high reliability and long life installation seal and plug-in seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of the present invention

[0029] In the figure, 11-socket housing, 12-first mounting plate, 13-pin contact, 14-glass insulator, 15-second mounting plate, 16-first sealing ring, 17-second sealing ring, 18-third sealing ring,. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] like Figure 1As shown, a titanium alloy socket with glass-fired copper contacts includes a glass insulator 14, a pin contact 13, and a socket housing 11. The glass insulator 14, the pin contact 13, and the socket housing 11 are sintered into a glass-fired assembly through a glass-fired process. The inner cavity of the socket housing 11 is divided into two cavities by the glass insulator 14. A first mounting plate 12 is installed in one cavity. One end of the pin contact 13 passes through the first mounting plate 12 and abuts against the glass insulator 14. A second mounting plate 15 is installed in the other cavity. The other end of the pin contact 13 passes through the second mounting plate 15 and abuts against the glass insulator 14. The pin contact 13 is made of a copper expansion alloy material with an expansion coefficient of 8.0×10 -6 / K~10.0×10 -6 / K, the melting temperature is above 2000℃, and it will not soften or melt at the sintering temperature of 940℃~1000℃, and can be sintered into shape. The electrical properties of the copper expansion alloy pin contact 13 are superior, and the magnetic interference problem caused by the iron-nickel expansion alloy glass sintering connector is completely solved. The socket housing 11 is made of titanium alloy, and its expansion coefficient is 8.0×10 -6 / K~10.0×10 -6 / K, this socket is matched and sealed. According to the matching sealing principle: the expansion coefficient of the shell is equal to or slightly greater than the expansion coefficient of the glass powder. In order to match the expansion coefficient of the shell and copper pin materials, the expansion coefficient of the glass powder of the glass insulator 14 is 5.0×10 -6 / K~7.0×10 -6 / K, in the final cooling stage of the sintering process, the shrinkage dimensions of the two are consistent, no cracks will occur between the glass and metal, no water leakage will occur, and the insulation resistance of the product is guaranteed. In this embodiment, a convex ring is provided on the socket housing 11, and an annular sealing groove is provided on the side wall of the convex ring. A first sealing ring 16 is installed in the annular sealing groove. During use of the socket, the first sealing ring 16 is installed and squeezed against the bulkhead to achieve sealing. Furthermore, two sealing grooves are provided on the outer circle of the socket housing 11 near the end of the first sealing ring 16, and a second sealing ring 18 is installed in each sealing groove. A third sealing ring 17 is installed on the outer end surface of the socket housing 11 away from the first sealing ring 16. Therefore, the socket and the bulkhead are sealed by two radial O-rings and one axial O-ring, which greatly increases the life of the water seal, improves reliability, and reduces the risks faced by personnel and internal equipment in the cabin.

[0037] In this embodiment, the sintering process of the glass sintered component includes the following steps:

[0038] S1: Pressing glass blanks: Put the selected glass powder into a blank pusher and press the glass powder according to the size and weight of the glass insulator 14 to obtain a glass blank;

[0039] S2: wax removal, using roving gloves to place the plate with the glass blank on the mesh belt wax removal vitrification furnace for wax removal, the wax removal step temperature is room temperature ~ 550 ° C, and the wax removal time is 40 hours; specifically, when removing the wax, the mesh belt wax removal vitrification furnace is first heated to 240 ° C, the holding time is: 6 hours, then heated to 300 ° C, the holding time is: 22 hours, then heated to 380 ° C, the holding time is: 4 hours, then heated to 420 ° C, the holding time is: 2 hours, then heated to 480 ° C, the holding time is: 2 hours, then heated to 530 ° C, the holding time is: 4 hours, fully release or decompose the wax in the glass powder, so that it is completely removed, and there will be no bubbles inside and on the surface of the sintered glass body, thereby not affecting the insulation performance of the product;

[0040] S3: Vitrification. Place the waxed glass blank in a mesh belt vitrification furnace for vitrification. The vitrification step temperature ranges from room temperature to 730°C. The total vitrification time is 16 hours. Specifically, the mesh belt vitrification furnace is first heated to 260°C for 1.6 hours of heat preservation, then heated to 330°C for 4.8 hours of heat preservation, then heated to 470°C for 1.6 hours of heat preservation, then heated to 550°C for 1.6 hours of heat preservation, then heated to 650°C for 1.6 hours of heat preservation, then heated to 730°C for 3.2 hours of heat preservation. Since the glass blank is easily deformed due to softening during the vitrification process, and the gap between the glass mounting plate and the metal is small on both sides, once the deformation exceeds the reserved gap , then the parts cannot fit well during assembly, and the problem of assembly failure occurs. In order to control the deformation and not exceed the reserved gap, the glass blank is vitrified four times. The glass blank must be turned over after each vitrification. The highest temperature of the step temperature for each vitrification is adjusted by ±3℃ according to the shape of the glass out of the furnace. During each vitrification, the mesh belt vitrification furnace is first heated to 260℃ for 0.4h, then heated to 330℃ for 1.2h, then heated to 470℃ for 0.4h, then heated to 550℃ for 0.4h, then heated to 650℃ for 0.4h, then heated to 730℃ for 0.8h.

[0041] S4: Assembling, fixing the vitrified glass blank with a graphite mold, and then assembling the pin contact 13, the housing and the glass blank together to form a component to be sintered;

[0042] S5: Sintering: Place the assembled components to be sintered in a sintering furnace at a sintering temperature of 940°C for 60 minutes, so that the glass and metal are fully infiltrated and bonded, and the seal is firm. The produced glass-sintered components will not leak in the axial direction and the insulation resistance is qualified.

[0043] S6: demolding, disassembling the graphite mold to obtain a sintered component;

[0044] In another embodiment, the sintering process of the glass sintered component includes the following steps:

[0045] S1: Pressing glass blanks: Put the selected glass powder into a blank pusher and press the glass powder according to the size and weight of the glass insulator 14 to obtain a glass blank;

[0046] S2: wax removal, using roving gloves to place the plate with the glass blank on the mesh belt wax removal vitrification furnace for wax removal, the wax removal step temperature is room temperature ~ 550 ° C, and the wax removal time is 48 hours; specifically, when removing the wax, the mesh belt wax removal vitrification furnace is first heated to 240 ° C ~ 260 ° C, the holding time is: 7 hours, then heated to 330 ° C, the holding time is: 24 hours, then heated to 400 ° C, the holding time is: 5 hours, then heated to 450 ° C, the holding time is: 3 hours, then heated to 520 ° C, the holding time is: 3 hours, then heated to 550 ° C, the holding time is: 6 hours, fully release or decompose the wax in the glass powder, so that it is completely removed, and there will be no bubbles inside and on the surface of the sintered glass body, thereby not affecting the insulation performance of the product;

[0047] S3: Vitrification. Place the waxed glass blank in a mesh belt vitrification furnace for vitrification. The vitrification step temperature is from room temperature to 730°C. The total vitrification time is 12 hours. Specifically, the mesh belt vitrification furnace is first heated to 240°C and the holding time is 1.2 hours. Then it is heated to 300°C and the holding time is 3.6 hours. Then it is heated to 400°C and the holding time is 1.2 hours. Then it is heated to 500°C and the holding time is 1.2 hours. Then it is heated to 620°C and the holding time is 1.2 hours. Then it is heated to 690°C and the holding time is 2.4 hours. Since the glass blank is easily deformed due to softening during the vitrification process, and the gap between the glass mounting plate and the metal is small, once the deformation exceeds the reserved gap, , then the parts cannot fit well during assembly, and the problem of assembly failure occurs. In order to control the deformation and not exceed the reserved gap, the glass blank is vitrified four times. The glass blank must be turned over after each vitrification. The highest temperature of the step temperature for each vitrification is adjusted by ±3℃ according to the shape of the glass out of the furnace. During each vitrification, the mesh belt vitrification furnace is first heated to 240℃ for 0.3h, then heated to 300℃ for 0.9h, then heated to 400℃ for 0.3h, then heated to 500℃ for 0.3h, then heated to 620℃ for 0.3h, then heated to 690℃ for 0.6h.

[0048] S4: Assembling, fixing the vitrified glass blank with a graphite mold, and then assembling the pin contact 13, the housing and the glass blank together to form a component to be sintered;

[0049] S5: Sintering: Place the assembled components to be sintered in a sintering furnace at a sintering temperature of 1100°C for 15 minutes, so that the glass and metal are fully infiltrated and bonded, and the seal is firm. The produced glass-sintered components will not leak in the axial direction and the insulation resistance is qualified.

[0050] S6: demolding, disassembling the graphite mold to obtain a sintered component;

[0051] In another embodiment, the sintering process of the glass sintered component includes the following steps:

[0052] S1: Pressing glass blanks: Put the selected glass powder into a blank pusher and press the glass powder according to the size and weight of the glass insulator 14 to obtain a glass blank;

[0053] S2: wax removal, using roving gloves to place the plate with the glass blanks on the mesh belt wax removal vitrification furnace for wax removal, the wax removal step temperature is room temperature ~ 550 ° C, and the wax removal time is 44 hours; specifically, when removing the wax, the mesh belt wax removal vitrification furnace is first heated to 250 ° C, the holding time is: 6.5 hours, then heated to 315 ° C, the holding time is: 23 hours, then heated to 390 ° C, the holding time is: 4.5 hours, then heated to 435 ° C, the holding time is: 2.5 hours, then heated to 500 ° C, the holding time is: 2.5 hours, then heated to 540 ° C, the holding time is: 5 hours, fully release or decompose the wax in the glass powder, so that it is completely removed, and there will be no bubbles inside and on the surface of the sintered glass body, thereby not affecting the insulation performance of the product;

[0054] S3: Vitrification. Place the waxed glass blank in a mesh belt vitrification furnace for vitrification. The vitrification step temperature ranges from room temperature to 730°C. The total vitrification time is 14 hours. Specifically, the mesh belt vitrification furnace is first heated to 250°C for 1.4 hours of heat preservation, then heated to 315°C for 4.2 hours of heat preservation, then heated to 435°C for 1.4 hours of heat preservation, then heated to 525°C for 1.4 hours of heat preservation, then heated to 635°C for 1.4 hours of heat preservation, then heated to 710°C for 2.8 hours of heat preservation. Since the glass blank is easily deformed due to softening during the vitrification process, and the gap between the glass mounting plate and the metal is small on both sides, once the deformation exceeds the reserved gap, the glass blank will be deformed during the vitrification process. During assembly, the parts cannot fit well together, and the problem of assembly failure occurs. In order to control the deformation and not exceed the reserved gap, the glass blank is vitrified four times. The glass blank must be turned over after each vitrification. The highest temperature of the step temperature for each vitrification is adjusted by ±3°C according to the shape of the glass out of the furnace. During each vitrification, the mesh belt vitrification furnace is first heated to 240°C~260°C, and the holding time is 0.35h. Then it is heated to 315°C, and the holding time is 1.05h. Then it is heated to 435°C, and the holding time is 0.35h. Then it is heated to 525°C, and the holding time is 0.35h. Then it is heated to 635°C, and the holding time is 0.35h. Then it is heated to 710°C, and the holding time is 0.7h.

[0055] S4: Assembling, fixing the vitrified glass blank with a graphite mold, and then assembling the pin contact 13, the housing and the glass blank together to form a component to be sintered;

[0056] S5: Sintering: Place the assembled components to be sintered in a sintering furnace at a sintering temperature of 1020°C for 37 minutes, so that the glass and metal are fully infiltrated and bonded, and the seal is firm. The produced glass-sintered components will not leak in the axial direction and the insulation resistance is qualified.

[0057] S6: demolding, disassembling the graphite mold to obtain a sintered component;

[0058] The performance of the glass-sintered component made from one of the above three embodiments was tested and compared with the existing iron-nickel expansion alloy or Kovar alloy. The performance comparison table is as follows:

[0059]

[0060]

[0061] As shown in Table 1, which compares the measured temperature rise values ​​for contacts with a diameter of φ1.5mm, when the pin specification is φ1.5mm, the temperature rise of the copper expansion alloy when the test current is 13A is consistent with that of the iron-nickel expansion alloy or Kovar alloy when the test current is 10A. The temperature rise of the copper expansion alloy when the test current is 17A is extremely close to that of the iron-nickel expansion alloy or Kovar alloy when the test current is 13A.

[0062] As shown in Table 2, which compares rated currents (source: GJB1216), if other electrical performance indicators are constant and the rated current is 13A, then if the pins are made of iron-nickel expansion alloy or Kovar, then the specification should be φ2mm. If the pins are made of copper expansion alloy, the specification can be φ1.5mm. Therefore, using copper expansion alloy can reduce the pin specifications and overall dimensions. The greater the number of pins, the greater the year-on-year reduction in product dimensions.

[0063] Therefore, the pin contact 13 of the present invention is made of copper expansion alloy material, which can not only greatly improve the electrical performance of the product, but also reduce the size of the product, making the product miniaturized and lightweight.

[0064] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sintering process for a glass-sintered assembly of a titanium alloy socket with glass-sintered copper contacts, characterized by: The titanium alloy socket with glass-fired copper contacts includes a glass insulator, a pin contact, and a socket shell. The glass insulator, pin contact, and socket shell are sintered into a glass-fired assembly through a glass-fired process. The inner cavity of the socket shell is divided into two cavities by the glass insulator. A first mounting plate is installed in one cavity. One end of the pin contact passes through the first mounting plate and abuts the glass insulator. A second mounting plate is installed in the other cavity. The other end of the pin contact passes through the second mounting plate and abuts the glass insulator. The pin contact is made of copper expansion alloy with an expansion coefficient of 8.0×10 -6 / K~10.0×10 -6 / K, the melting temperature is above 2000℃, the socket shell is made of titanium alloy, and its expansion coefficient is 8.0×10 -6 / K~10.0×10 -6 / K, the expansion coefficient of the glass powder of the glass insulator is 5.0×10 -6 / K~7.0×10 -6 / K, the sintering process of the glass sintered component includes the following steps: S1: Pressing glass blanks: Put the selected glass powder into a blank pusher and press the glass powder according to the size and weight of the glass insulator to obtain a glass blank; S2: Dewaxing: Use roving gloves to place the plate with the glass blanks on the mesh belt dewaxing vitrification furnace for dewaxing. The dewaxing step temperature ranges from room temperature to 550°C, and the dewaxing time is 40h to 48h. S3: Vitrification: Place the waxed glass blank in a mesh belt vitrification furnace for vitrification. The vitrification step temperature ranges from room temperature to 730°C, and the total vitrification time is 12-16 hours. S4: Assembling, fixing the vitrified glass blank with a graphite mold, and then assembling the pin contact parts, the housing and the glass blank together to form a component to be sintered; S5: Sintering: placing the assembled components to be sintered in a sintering furnace at a sintering temperature of 940°C to 1100°C for a sintering time of 15 min to 60 min; S6: demolding, disassembling the graphite mold to obtain a sintered component; In step S3, the mesh belt vitrification furnace is first heated to 240° C. to 260° C. for a holding time of 1.2 to 1.6 hours, then heated to 300° C. to 330° C. for a holding time of 3.6 to 4.8 hours, then heated to 400° C. to 470° C. for a holding time of 1.2 to 1.6 hours, then heated to 500° C. to 550° C. for a holding time of 1.2 to 1.6 hours, then heated to 620° C. to 650° C. for a holding time of 1.2 to 1.6 hours, then heated to 690° C. to 730° C. for a holding time of 2.4 to 3.2 hours; The glass blank is vitrified four times, and the glass blank must be turned over after each vitrification. The highest temperature of the step temperature for each vitrification is adjusted by ±3°C according to the shape of the glass out of the furnace. During each vitrification, the mesh belt vitrification furnace is first heated to 240°C~260°C with a holding time of 0.3h~0.4h, then heated to 300°C~330°C with a holding time of 0.9h~1.2h, then heated to 400°C~470°C with a holding time of 0.3h~0.4h, then heated to 500°C~550°C with a holding time of 0.3h~0.4h, then heated to 620°C~650°C with a holding time of 0.3h~0.4h, then heated to 690°C~730°C with a holding time of 0.6h~0.8h.

2. The sintering process of the glass-sintered assembly of the titanium alloy socket with glass-sintered copper contacts according to claim 1, characterized in that: In step S2, when draining wax, the mesh belt drain wax vitrification furnace is first heated to 240℃~260℃, and the holding time is 6h~7h, and then heated to 300℃~330℃, and the holding time is 22h~24h, and then heated to 380℃~400℃, and the holding time is 4h~5h, and then heated to 420℃~450℃, and the holding time is 2h~3h, and then heated to 480℃~520℃, and the holding time is 2h~3h, and then heated to 530℃~550℃, and the holding time is 4h~6h.

3. The sintering process of the glass-sintered assembly of the titanium alloy socket with glass-sintered copper contacts according to claim 1 or 2, characterized in that: A convex ring is provided on the socket housing, an annular sealing groove is provided on the side wall of the convex ring, and a first sealing ring is installed in the annular sealing groove.

4. The sintering process of the glass-sintered assembly of the titanium alloy socket with glass-sintered copper contacts according to claim 3, characterized in that: Two sealing grooves are provided on the outer circle of the socket housing at one end close to the first sealing ring, and the second sealing ring is installed in each of the sealing grooves.

5. The sintering process of the glass-sintered assembly of the titanium alloy socket with glass-sintered copper contacts according to claim 4, characterized in that: A third seal is installed on the outer end surface of the socket housing away from the first seal ring.

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