Assembly fixture for micro-part testing

Abstract

The utility model relates to the technical field of assembly fixture, disclose a kind of assembly fixture for micro parts testing, comprising: upper tooling, cylindrical inner core is coaxially installed on upper tooling, and detection part is provided on upper tooling, and detection part is used to detect the coaxiality of cylindrical inner core and metal shell;Third connecting bolt is installed on upper tooling;Lower tooling, metal shell is coaxially installed on lower tooling, and elastic gasket is installed on lower tooling;Third connecting bolt is threadedly connected with lower tooling to assemble upper tooling and lower tooling together, realize the assembly of cylindrical inner core and metal shell;Elastic gasket is between upper tooling and lower tooling.The utility model is set to upper tooling, lower tooling cooperation again combined detection part, improve the assembly accuracy of cylindrical inner core and metal shell, simplify assembly process simultaneously, realize the purpose of adjusting the coaxiality of cylindrical inner core and metal shell quickly, provide support for subsequent dispensing operation, greatly improve the overall assembly efficiency of micro parts.

Description

Technical Field

[0001] This utility model relates to the field of assembly tooling technology, specifically, it is an assembly tooling for testing micro parts. Background Technology

[0002] With the rapid development of industries such as electronics, medical devices, and optical components, an increasing number of products require the assembly of miniature parts. These parts are typically small in size, complex in shape, and lightweight, making traditional manual assembly unable to meet their high-precision and high-speed requirements. To address this issue, automated assembly technology has emerged, especially in the assembly of miniature parts, where precise positioning, assembly, and quality inspection have become core challenges. During the assembly of miniature parts, corresponding assembly fixtures are typically used to facilitate the transfer and assembly of these parts. This allows for the transfer of only the fixtures, preventing damage to the parts themselves.

[0003] One of the products developed by our company involves a miniature component. During the assembly process of this miniature component, it is necessary to adjust the assembly relationship of the miniature component to ensure proper assembly. Therefore, special inspection is required to assist in adjusting the assembly position. Existing assembly fixtures do not have corresponding inspection structures and cannot meet the needs of automated assembly of this miniature component. If the assembly is performed manually, not only will the assembly accuracy not be guaranteed, but the assembly efficiency will also be extremely low. Therefore, our company has developed an automated assembly fixture for this miniature component to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide an assembly fixture for testing micro parts, which solves the problem that existing assembly fixtures do not have corresponding testing structures and cannot meet the assembly requirements of the micro parts developed by our company.

[0005] This utility model is achieved through the following technical solution: an assembly fixture for testing micro-parts, comprising: The upper fixture is provided with a cylindrical inner core coaxially mounted on it. The upper fixture is equipped with a detection part for detecting the coaxiality between the cylindrical inner core and the metal outer shell. A third connecting bolt is installed on the upper fixture. The lower tooling has a metal housing coaxially mounted on it, and an elastic gasket is installed on the lower tooling. The third connecting bolt is threaded to the lower tooling to assemble the upper and lower toolings together, thereby assembling the cylindrical inner core and the metal outer shell; the elastic gasket is located between the upper and lower toolings.

[0006] To better realize this utility model, the upper tooling further includes a PCB board and a carrier, the PCB board being detachably mounted on the carrier; the detection unit includes a PCB board and tooling detection pins, a metal shell connecting probe, and a cylindrical inner core connecting probe disposed on the PCB board; the PCB board is located on the side of the carrier facing away from the lower tooling, the metal shell connecting probe is in contact with the metal shell, and the cylindrical inner core connecting probe is in contact with the cylindrical inner core.

[0007] To better realize this utility model, the lower tooling is further provided with a reserved through hole, the axis of which coincides with the tooling detection needle.

[0008] To better realize this utility model, the end of the probe connected to the cylindrical inner core is tapered, and its diameter is smaller than the inner diameter of the pin provided on the cylindrical inner core.

[0009] To better realize this utility model, the tooling detection needle, the metal shell connecting probe, and the cylindrical inner core connecting probe are further gold-plated or copper-plated. To better realize this utility model, the PCB board is further mounted on the carrier by screws and / or adhesives.

[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects: By setting up upper and lower tooling and combining them with the detection part, this utility model improves the assembly accuracy of the cylindrical inner core and the metal outer shell, simplifies the assembly process, and achieves the purpose of quickly adjusting the coaxiality of the cylindrical inner core and the metal outer shell, providing support for subsequent dispensing operations and greatly improving the overall assembly efficiency of micro parts. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 This is an exploded view of the structure of the micro-part of this utility model.

[0013] Figure 3 This is an exploded view of the structure of this utility model.

[0014] Figure 4 This is a schematic diagram of a micro-part structure.

[0015] Wherein: A - Micro component; A1 - Insulating ring; A2 - Cylindrical inner core; A3 - Metal shell; 101 - Upper fixture; 1011 - PCB board; 1012 - Carrier; 102 - Elastic gasket; 103 - Lower fixture; 104 - Fixture detection probe; 105 - Metal shell connecting probe; 106 - Cylindrical inner core connecting probe; 107 - First connecting bolt; 108 - Second connecting bolt; 109 - Third connecting bolt; 110 - Reserved through hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Example 1:

[0019] This embodiment provides an assembly fixture for testing micro-parts, specifically as follows: Figures 1-4 As shown, an assembly fixture for testing miniature parts includes: The upper tooling 101 is used to fit an insulating ring A1 onto a cylindrical inner core A2. The cylindrical inner core A2 is coaxially mounted on the upper tooling 101. The upper tooling 101 is provided with a detection part for detecting the coaxiality between the cylindrical inner core A2 and the metal outer shell A3. A third connecting bolt 109 is installed on the upper tooling 101. The lower tooling 103 has a metal housing A3 coaxially mounted on it, and an elastic gasket 102 is installed on the lower tooling 103; in this embodiment, the elastic gasket 102 is a spring disc.

[0020] The third connecting bolt 109 is threadedly connected to the lower tooling 103 to assemble the upper tooling 101 and the lower tooling 103 together, thereby assembling the cylindrical inner core A2 and the metal outer shell A3; the elastic gasket 102 is located between the upper tooling 101 and the lower tooling 103, and remains in a compressed state after assembly.

[0021] The upper tooling 101 is supported by elastic washers 102 to stabilize its position. An electric torque screwdriver is used to tighten individual third connecting bolts 109 to adjust the distance between the corresponding position of the upper tooling 101 and the lower tooling 103, thereby adjusting the coaxiality of the upper and lower tooling 101 and simultaneously adjusting the assembly coaxiality of the cylindrical inner core A2 and the metal outer shell A3. The detection unit transmits signals based on the coaxiality of the cylindrical inner core A2 and the metal outer shell A3, allowing operators to control the tightening of the third connecting bolts 109 using the electric torque screwdriver.

[0022] The above settings improve the assembly accuracy of the cylindrical inner core A2 and the metal outer shell A3, while simplifying the assembly process. This allows for quick adjustment of the coaxiality of the cylindrical inner core A2 and the metal outer shell A3, providing support for subsequent dispensing operations and significantly improving the overall assembly efficiency of the micro part A.

[0023] Example 2:

[0024] This embodiment further extends the above embodiment, specifically as follows: Figures 1-4 As shown, the upper fixture 101 includes a PCB board 1011 and a carrier 1012. The PCB board 1011 is detachably mounted on the carrier 1012. The detection unit includes the PCB board 1011 and a fixture detection pin 104, a metal shell connecting probe 105, and a cylindrical inner core connecting probe 106 disposed on the PCB board 1011. The PCB board 1011 is located on the side of the carrier 1012 facing away from the lower fixture 103. The metal shell connecting probe 105 contacts the metal shell A3, and the cylindrical inner core connecting probe 106 contacts the cylindrical inner core A2.

[0025] The testing process is as follows: First, an assembly operation is performed. The upper fixture 101 is placed on the cylindrical inner core A2 using a robotic arm. At this time, the cylindrical inner core connecting probe 106 is connected to the pin on the cylindrical inner core A2. Then, the upper fixture 101 is connected to the cylindrical inner core A2 using the second connecting bolt 108. Next, the robotic arm places the metal outer shell A3 in the lower fixture 103 and uses the first connecting bolt 107 to firmly fix the metal outer shell A3 on the lower fixture 103. Finally, the robotic arm places the upper fixture 101 on the lower fixture 103. At this time, the third connecting bolt 109 is turned, and the third connecting bolt 109 begins to screw into the threaded hole on the lower fixture 103, and the elastic washer 102 begins to be compressed. The initial pre-tightening installation of the upper fixture 101 and the lower fixture 103 is completed. Next, the testing operation is carried out. The lower fixture 103 is placed on the testing table using a robotic arm. At this time, the lower fixture 103 is fixed, but the upper fixture 101 is not fixed. Then, a DC power supply (model: DH1718E) is connected to the fixture test pin 104. The current is supplied to the micro component A through the fixture test pin 104, PCB board 1011, metal shell connecting probe 105, and cylindrical inner core connecting probe 106. At the same time, an electrical signal can be obtained by connecting a digital voltmeter (model: Detech 34465A (6½-bit)) to the fixture test pin 104. Then, the gate state difference and swing state difference are detected when the four-position rolling meter outputs. Different electrical signals are obtained by rotating the lower fixture 103 at different angles using the testing platform. Based on these signals, the third connecting bolt 109 is adjusted using an electric torque screwdriver, thereby adjusting the relative position of the cylindrical inner core A2 and the metal outer shell A3. This ensures the perpendicularity of the cylindrical inner core A2 and the metal outer shell A3 meets the requirements, and that the gate state difference and swing state difference both meet the requirements (≤1mV) when the four-position roller meter outputs the micro-part A. The DC power supply and digital voltmeter are located on the testing platform for easy maintenance and disassembly. According to the equipment specifications, the digital meter parameters are: accuracy up to 6.5 digits, programmable; sampling resistor accuracy better than 0.1%; sampling resistor temperature coefficient better than 10ppm / ℃; DC power supply specifications: ±15V output, load capacity greater than or equal to 10m of micro-part A; DC power supply ripple greater than or equal to 10mV, programmable.

[0026] Furthermore, the lower fixture 103 is provided with a reserved through hole 110, the axis of which coincides with the fixture detection needle 104. The coaxial reserved through hole 110 exposes the fixture detection needle 104, facilitating connection to a DC power supply and a digital voltmeter.

[0027] Furthermore, the end of the cylindrical inner core connecting probe 106 is tapered, and its diameter is smaller than the inner diameter of the pins provided on the cylindrical inner core A2. The tapered design allows the cylindrical inner core connecting probe 106 to be better inserted into the pin hole when the cylindrical inner core A2 is combined with the upper tooling 101, ensuring good contact between the cylindrical inner core connecting probe 106 and the pins of the cylindrical inner core A2.

[0028] Furthermore, the tooling detection needle 104, the metal shell connecting probe 105, and the cylindrical inner core connecting probe 106 are plated with gold or copper. In this embodiment, gold plating is used to reduce the instability of electrical signal (voltage value) caused by the change in resistance value due to oxidation, thereby improving the detection accuracy.

[0029] Furthermore, the PCB board 1011 is mounted on the carrier 1012 using screws and / or adhesive. In this embodiment, when assembling the PCB board 1011 and the carrier 1012, adhesive is first applied to the contact surfaces of the PCB board 1011 and the carrier 1012, and then the PCB board 1011 is fixed to the carrier 1012 using screws. The adhesive serves two purposes: firstly, to prevent the PCB board 1011 from shaking after the screws loosen, and secondly, to fill the gaps between the PCB board 1011 and the carrier 1012, preventing dust or other impurities from entering and interfering with the circuitry of the PCB board 1011.

[0030] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An assembly fixture for testing micro-parts, characterized in that, include: The upper fixture (101) is coaxially mounted with the cylindrical inner core (A2). The upper fixture (101) is provided with a detection part, which is used to detect the coaxiality between the cylindrical inner core (A2) and the metal outer shell (A3). The upper fixture (101) is also equipped with a third connecting bolt (109). The lower tooling (103) has a metal housing (A3) coaxially mounted on it, and an elastic gasket (102) is installed on the lower tooling (103). The third connecting bolt (109) is threadedly connected to the lower tooling (103) to assemble the upper tooling (101) and the lower tooling (103) together, thereby assembling the cylindrical inner core (A2) and the metal outer shell (A3); the elastic gasket (102) is located between the upper tooling (101) and the lower tooling (103).

2. The assembly fixture for testing micro-parts according to claim 1, characterized in that: The upper fixture (101) includes a PCB board (1011) and a carrier (1012). The PCB board (1011) is detachably mounted on the carrier (1012). The detection unit includes the PCB board (1011) and a fixture detection pin (104), a metal shell connection probe (105), and a cylindrical inner core connection probe (106) disposed on the PCB board (1011). The PCB board (1011) is located on the side of the carrier (1012) away from the lower fixture (103). The metal shell connection probe (105) contacts the metal shell (A3), and the cylindrical inner core connection probe (106) contacts the cylindrical inner core (A2).

3. The assembly fixture for testing micro-parts according to claim 2, characterized in that: The lower tooling (103) is provided with a reserved through hole (110), and the axis of the reserved through hole (110) coincides with the tooling detection needle (104).

4. The assembly fixture for testing micro-parts according to claim 2, characterized in that: The end of the probe (106) connected to the cylindrical inner core is tapered, and its diameter is smaller than the inner diameter of the pin provided on the cylindrical inner core (A2).

5. The assembly fixture for testing micro-parts according to claim 2, characterized in that: The tooling detection needle (104), the metal shell connecting probe (105), and the cylindrical inner core connecting probe (106) are plated with gold or copper.

6. The assembly fixture for testing micro-parts according to claim 2, characterized in that: The PCB board (1011) is mounted on the carrier (1012) by screws and / or adhesive.

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