Laser welding method for watch band
A technology of laser welding and watch straps, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of poor welding effect and too much air mixed in
Active Publication Date: 2015-05-20
HANS LASER TECH IND GRP CO LTD
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Problems solved by technology
However, too much air will be mixed in the traditional laser welding process, resulting in cracks and pores at the solder joint position, and the welding effect is poor
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[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.
[0025] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as...
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Abstract
The invention discloses a laser welding method for a watch band. A continuous laser beam with a spot diameter of being greater than the diameter of a connecting steel needle is adopted and faces the center of the end face of the connecting steel needle,thus, during welding, the parts, which protrude out of the edge of a through hole, of the connecting steel needle are simultaneously melted to form a weld pool. Compared with the conventional welding method of one-circle circular motion, the method has the advantage that the weld pool formed by the method is kept for a longer time so as to fully exhaust gas in the welding pool. In addition, the connecting steel needle protrudes out of the edge of the through hole, liquid-state melt diffuses from the center to the periphery of the section of the connecting steel needle under the action of surface tension and gravity when the connecting steel needle is melted, so that the gas existing in the welding pool is squeezed out. Thus, through the laser welding method for the watch band, cracks and air holes can be effectively prevented from being produced at the positions of welding spots by the existing gas so as to improve the welding effect.
Description
technical field [0001] The invention relates to welding technology, in particular to a method for laser welding watch straps. Background technique [0002] The method of fixing two components by welding has been widely used in various fields. Taking watch straps as an example, there are many materials that can be used for making watch straps, mainly including stainless steel, tungsten steel, titanium alloy, copper alloy, plastic, nylon, leather and canvas. Among them, the grains of the metal watch band are generally connected by welding. [0003] Since the butt welding (resistance welding) method is unfavorable to the appearance and has a large amount of grinding, it has been gradually replaced by laser welding. In the traditional laser welding method, pulse laser welding equipment is generally used, and certain parameters such as power, pulse width, and frequency are set. Welding between grains. However, too much air will be mixed in the traditional laser welding proces...
Claims
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IPC IPC(8): B23K26/22
Inventor 朱宝华胡学安高云峰
Owner HANS LASER TECH IND GRP CO LTD