Ceramic jig for positioning split lead

Abstract

The utility model discloses a ceramic jig for positioning a split lead, which belongs to the technical field of semiconductor discrete device welding and comprises a tube socket, a tube core is fixedly connected in the tube socket, the split lead is fixedly connected on the tube core and positioned in the tube socket, the ceramic jig is mounted on the tube socket, and the split lead is positioned in the ceramic jig. According to the utility model, independent lead welding positioning is adopted, the problem of lead welding positioning can be solved by using the simple positioning ceramic jig, and compared with positioning by using a carbon mold, the positioning ceramic jig is simple to operate, easy to take and place, firm and durable, can be recycled, saves production cost, is flexible to use, and is suitable for popularization and application. The assembly is divided into single individuals, independent operation is facilitated, manual taking and placing can be achieved, the adopted ceramic jig is firm, durable, not prone to damage and capable of being repeatedly used, cost is saved, meanwhile, positioning is accurate and independent, and the assembly is not affected by thermal expansion and cold contraction in the production process.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor discrete device welding, in particular to a ceramic fixture used for positioning split leads. Background Art

[0002] For all-copper high-power press-fit diodes for automobiles, the accuracy of lead positioning is a relatively large challenge because the split leads are welded inside the all-copper socket. Positioning determines the reliability of the product and also determines whether the lead spot welding or soldering can be correct after press-fitting.

[0003] At present, graphite is generally used to make corresponding welding jigs. However, for all-copper shell press-mounted diodes, the design is relatively complicated due to the problem of lead positioning, and graphite processing is difficult. During the production process, due to its special design, the operation is inconvenient and it is easy to cause graphite damage, and the production cost is high;

[0004] The design of the existing welding jig is complex. Due to the particularity of the tube socket, a positioning carbon mold needs to be designed, and the positioning of the lead must also take into account the positioning of the tube core, which makes the processing difficult. The carbon mold, as a welding jig, requires accurate positioning and high tolerance requirements. The processing has poor operability. Due to the particularity of the lead and its easy breakage, the industry currently uses graphite for the processing of welding jigs. Graphite is relatively brittle and is easily damaged or scrapped by collision during use, affecting the welding effect and production cost. Therefore, a ceramic jig for positioning split leads is proposed. Summary of the invention

[0005] The utility model aims to provide a ceramic fixture for positioning a split lead to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the utility model provides the following technical solutions: a ceramic fixture for positioning split leads, comprising a tube seat, a tube core is fixedly connected inside the tube seat, a split lead is fixedly connected on the tube core and located inside the tube seat, and a ceramic fixture is installed on the tube seat.

[0007] As a further preferred embodiment of the present technical solution: the tube core inside the tube core and the split leads connected to the tube core are supported by the tube seat, and the ceramic fixture is used for connecting the split leads and protecting the connected split leads.

[0008] As a further preferred embodiment of the present technical solution: a positioning hole is provided in the middle of the ceramic fixture, and the positioning hole 41 is provided to guide the installation of the split lead 1 and to fix the split lead 1 for later operation;

[0009] Wherein, the forked lead passes through the positioning hole.

[0010] As a further preferred embodiment of the technical solution: the ceramic fixture has two grooves symmetrically formed on the upper and lower sides, and the grooves are used to receive the pipe seat;

[0011] Among them, the inner diameter of the groove is matched with the outer diameter of the pipe seat, and the above arrangement is convenient for installation efficiency.

[0012] As a further preferred embodiment of the present technical solution: through holes are evenly formed in the ceramic fixture, and the through holes are provided to facilitate the volatilization of soldering oil during the welding process.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model adopts independent lead welding positioning, and uses a simple positioning ceramic fixture to solve the problem of lead welding positioning. Compared with the use of carbon molds for positioning, the operation is simple, easy to take and put, and it is strong and durable, can be reused, and saves production costs;

[0015] The utility model is flexible to use, and is divided into individual units for independent operation. It is easy to operate, and manual placement can be done easily. The ceramic fixture is durable and not easy to break, and can be reused to save costs. At the same time, the positioning is accurate and independent, and is not affected by thermal expansion and contraction during the production process.

[0016] The utility model adopts a single independent design, which is easy to operate, is not affected by other products, is not affected by the high temperature during welding and the thermal expansion and contraction caused by furnace exit, uses a strong and durable ceramic material, has a small deformation, accurate positioning, is not easy to be damaged, can be recycled, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a ceramic fixture for positioning a split lead according to the utility model;

[0018] Figure 2 This is a schematic cross-sectional structure diagram of a ceramic fixture for positioning a split lead according to the utility model;

[0019] Figure 3 This is a schematic diagram of a first exploded structure of a ceramic fixture for positioning a split lead according to the utility model;

[0020] Figure 4 This is a schematic diagram of a second exploded structure of a ceramic fixture for positioning a split lead according to the utility model.

[0021] In the figure: 1, split lead; 2, tube core; 3, tube seat; 4, ceramic fixture; 41, positioning hole; 42, through hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Example

[0023] See also Figure 1-Figure 4 The utility model provides a technical solution: a ceramic fixture for positioning a split lead, comprising a tube seat 3, a tube core 2 is welded inside the tube seat 3, a split lead 1 is welded on the tube core 2 and located inside the tube seat 3, and a ceramic fixture 4 is clamped on the tube seat 3.

[0024] In this embodiment, specifically: the tube seat 3 is provided to receive the tube core 2 inside and the split lead 1 connected to the tube core 2, and the ceramic fixture 4 is provided to connect the split lead 1 on the one hand and to protect the connected split lead 1 on the other hand.

[0025] In this embodiment, specifically: solder paste is used as flux in the above-mentioned welding fixation.

[0026] In this embodiment, specifically: a positioning hole 41 is opened in the middle of the ceramic fixture 4, and the opened positioning hole 41 is used for guiding the installation of the split lead 1 on the one hand, and for fixing the split lead 1 on the other hand, so as to facilitate the subsequent operation;

[0027] The split lead 1 passes through the positioning hole 41 .

[0028] In this embodiment, specifically: the ceramic fixture 4 has two grooves symmetrically formed on the upper and lower sides, and the grooves are used to receive the pipe seat 3;

[0029] The inner diameter of the groove is matched with the outer diameter of the pipe seat 3. The above arrangement is convenient for installation without subdividing the installation surface.

[0030] In this embodiment, specifically: through holes 42 are evenly opened in the ceramic fixture 4, and the opened through holes 42 facilitate the volatilization of soldering oil during the welding process.

[0031] Working principle: first apply solder paste to the welding platform inside the tube seat 3, then put in the tube core 2, then apply solder paste on the tube core 4, and then place the lead head of the split lead 1 with the welding surface facing down on the solder paste, and finally insert it into the tube seat 3 through the groove opened on the ceramic fixture 4. At the same time, use the positioning hole 41 opened on the ceramic fixture 4 to pass the split lead 1, and then it can be put into the welding furnace for welding. During the welding process, the solder oil can be volatilized and discharged through the through hole 42 opened. After leaving the welding furnace, the ceramic fixture 4 can be directly removed. At this time, the split lead 1, the tube core 2 and the tube seat 3 are welded together to become an integrated semi-finished product.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ceramic fixture for positioning a split lead, comprising a tube holder (3), characterized in that: A tube core (2) is fixedly connected inside the tube base (3), a split lead (1) is fixedly connected on the tube core (2) and located inside the tube base (3), and a ceramic fixture (4) is installed on the tube base (3).

2. A ceramic fixture for positioning a split lead according to claim 1, characterized in that: A positioning hole (41) is provided in the middle of the ceramic fixture (4); Wherein, the forked lead (1) passes through the positioning hole (41).

3. A ceramic fixture for positioning a split lead according to claim 1, characterized in that: The ceramic fixture (4) has two grooves symmetrically formed on the upper and lower sides; The inner diameter of the groove is matched to the outer diameter of the tube seat (3).

4. A ceramic fixture for positioning a split lead according to claim 1, characterized in that: Through holes (42) are evenly arranged in the ceramic fixture (4).

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