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Production process of low-voltage fuse and low-voltage fuse

A production process and fuse technology, which is applied in the field of low-voltage protection fast fuse and its production process, can solve the problems of high connection process requirements and reduced product flow performance, and achieves simple process, suitable for mass production, and avoids mechanical problems. The effect of joining or welding

Pending Publication Date: 2020-11-13
美尔森电气保护系统(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-current products, the requirements for the connection process are very high, or the flow performance of the product will be reduced

Method used

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  • Production process of low-voltage fuse and low-voltage fuse
  • Production process of low-voltage fuse and low-voltage fuse
  • Production process of low-voltage fuse and low-voltage fuse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a low-voltage fuse, see Figure 1-Figure 8 , is a structural schematic diagram of the fuse of this embodiment, wherein the fuse includes: a housing 1, which is a hollow tubular structure with two ends open, the housing 1 includes a first end 14 and a second end 15, the second The side wall of one end 14 is symmetrically provided with two card slots 13, the side wall of the second end 15 is symmetrically provided with two card slots 13, and the second end 15 is also provided with at least one arc opening 16 for welding; The low-voltage fuse also includes two terminals 3, which are respectively assembled at both ends of the housing 1. A boss 32 is respectively provided on the two sides of the terminal 3, and the terminal 3 is clamped on the card of the housing 1 through the boss 32. Groove 13, in order to realize the precise positioning of terminal 3; Melt 4, one end of melt 4 is welded with a terminal 3 to form a melt terminal assembly, melt term...

Embodiment 2

[0067] This embodiment provides a production process for the fuse described in Embodiment 1, see Figure 9 , is the process flow diagram of the present embodiment, wherein the production process comprises steps:

[0068] S1. Provide a hollow shell with openings at both ends, and the side walls at both ends of the shell have respectively symmetrically arranged card slots, and provide a shell with bosses on both sides and a mounting part formed at one end terminal;

[0069] S2. A melt is provided, and one end of the melt is welded to a mounting portion of the terminal to form a melt terminal assembly;

[0070] S3. Assembling the melt terminal assembly to one end of the housing, and locking the boss of the terminal in the slot of the housing to achieve precise positioning;

[0071] S4. Assemble the other terminal to the other end of the housing, and engage the boss of the terminal in the slot of the housing to achieve precise positioning; the melt is on the housing The other e...

Embodiment 3

[0076] The low-voltage fuses assembled in Embodiment 1 or Embodiment 2 were used for performance testing, and the arc extinguishing time was shortened to 22 ms by comparison with the minimum breaking test.

[0077] However, when the bosses 32 are not provided on both sides of the terminal 3, the arc extinguishing time is 200 ms.

[0078] That is, the assembled low-voltage fuse in Embodiment 1 or Embodiment 2 can effectively shorten the arc extinguishing time, thereby improving product performance.

[0079] Among them, the minimum breaking test is carried out according to the standard of GB13539-1-2015.

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PUM

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Abstract

The invention discloses a production process of a low-voltage fuse and the fuse. The production process comprises the following steps: S1, providing a two-end shell and a terminal with a boss, whereinthe two ends of the shell are respectively provided with a clamping groove; S2, providing a melt, wherein one end of the melt is welded with the mounting part of one terminal; S3, assembling to a shell after welding, and clamping in a clamping groove of the shell through a boss to realize accurate positioning; S4, the other terminal being assembled to the other end of the shell, and the other endof the melt penetrating through the shell and being accurately welded to the terminal at the other end of the shell; S5, providing a gasket, and sleeving the end part of the shell with the gasket; and S6, providing an end cap, and fixing the end cap to the end part of the shell. The melt and the terminal are directly welded, only one contact point is provided, and the contact resistance is very small, so that a thick metal block is not needed for heat dissipation. The terminals are mechanically connected with the shell, so that the structure and the performance of the fuse are more stable andreliable, the fuse is not easy to damage, and mechanical automation is easy to realize.

Description

technical field [0001] The invention relates to an electrical device, in particular to a low-voltage protective fast fuse and a production process thereof. Background technique [0002] A fuse is an electrical appliance that fuses the fuse with the heat generated by itself and disconnects the circuit when the current exceeds the specified value. The fuse is based on the fact that after the current exceeds the specified value for a period of time, the heat generated by itself melts the melt, thereby disconnecting the circuit; a current protector made by using this principle. Fuses are widely used in high and low voltage power distribution systems and control systems, as well as electrical equipment. As short circuit and overcurrent protectors, fuses are one of the most commonly used protection devices. [0003] Existing fuses have the following packaging processes: [0004] 1. The melt is directly welded on the terminals on both sides, and then passes through the shell as a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H69/02H01H85/143H01H85/055H01H85/175
CPCH01H69/02H01H85/055H01H85/143H01H85/175
Inventor 王慧元李彦强吴宏佳豆忠勇陈嵩
Owner 美尔森电气保护系统(上海)有限公司