Molybdenum sheet assemblies for special lamps
Infrared lamp is a kind of light used for physiotherapy healing, industrial heating treatment lamp special environment, ceramic metal halide lamp belongs to a kind of advanced light source with superior performance, compared with other light sources, has the characteristics of high light efficiency, high color and long life, has been the lighting industry attaches great importance to and recognition. In recent years, the application of ceramic metal halide lamp is developing and popularizing in various fields, and ceramic metal halide lamp is a special lamp.
At present, many special lamps are made of molybdenum sheet assemblies by resistance welding with round molybdenum rod or molybdenum rod with flat potential at the head and end. In order to ensure the welding fastness to meet the requirements, the welding heat must reach the melting point of the material, the heat formula Q = 0.24i2RT, R = ρ*L/S.
This existing welded joint has the following disadvantages: When circular molybdenum and molybdenum piece during spot welding, directly between the two is the line and contact, contact area S small, lead to welding resistance R is large, the same spot welding current and welding time on artifacts caused by Q, make the product easy to welding, circular molybdenum and molybdenum piece directly welding at the same time, due to the molybdenum slice thin, easy to uneven, subsequent sealing is easy to cause air leakage.
When the conventional flat potential molybdenum rod and molybdenum sheet are directly spot welding, there is a face-to-face contact between the two, the contact area S is large, resulting in a small welding resistance R, the same spot welding current and spot welding time on the workpiece will cause a smaller Q, so that the product is not solid welding, easy to welding.
The molybdenum piece assembly for special lamp is arranged in the special lamp, including a molybdenum rod and a molybdenum piece connected by spot welding each other, the molybdenum rod comprises a spot welding end with flat potential and a rod-like tail end, flat potential front 1/3 is provided with a convex point, convex point and molybdenum piece contact through spot welding connection.
The flat potential of spot welding end and the convex point on the flat potential are formed in one piece, which is made by punching. Only a suitable model is required, and it is convenient to manufacture.
The length of flat potential is 3mm ~ 5mm, the thickness is 0.4mm ~ 0.7mm, to ensure the fastness to spot welding with molybdenum sheet.
We can produce molybdenum rod and molybdenum sheet according to customer's requirement.
