腾讯分分彩开奖直播专业从事精密钣金加工、激光切割加工为主的钣金加工型厂家

腾讯分分彩开奖直播

示例图片三
网站首页 > 行业资讯 > 钣金加工

精密钣金加工工艺对焊接工艺的影响

2018-06-07 10:36:00 腾讯分分彩开奖直播 阅读

尽管精密钣金加工速度还慢于模冲,但材料在精密钣金时不需要装夹固定,它没有模具消耗,无须修理模具,又可节省上下料的辅助时间和更换模具的时间,从而节省了加工费用,降低了生产成本。如果这些叶形孔都改为精密钣金加工,零件叶形孔的均布度、叶形孔型面尺寸均由程序保证,这样,单件在生产过程中不仅可以摆脱卧式冲床设备陈旧及冲模修理带来的一系列生产进度问题,还可以避免因冲模冲头硬度控制不好而带来的零件质量问题,保证了生产任务的顺利完成及组件加工的焊接质量。另外,微机程序控制的现代精密钣金系统能方便切割不同形状与尺寸的工件,所以从总体上考虑是更合算的。
Although the precision sheet metal processing speed is still slower than the die punching, the material does not need to be clamped in the precision sheet metal. It has no mold consumption, no need to repair the mold, save the auxiliary time of the material and the time of replacing the mold, thus saving the processing cost and reducing the production cost.If the leaf shape holes are all changed to precision sheet metal processing, the average distribution and the size of the leaf shape face are guaranteed by the program. In this way, the single piece can not only get rid of a series of production progress caused by the obsolescence of the horizontal punch equipment and the die repair in the process of production, but also avoid the control of the hardness of the punch die. The quality problems caused by the good parts ensure the smooth completion of production tasks and the welding quality of component processing. In addition, the modern precision sheet metal system controlled by microcomputer can conveniently cut workpieces of different shapes and sizes, so considering the whole is more cost-effective.

且由于整流器内外环在组件中与叶片需氩弧焊焊接在一起,该处焊缝为Ⅲ级焊缝,焊缝为T形接头。该零件焊后不进行X光检查及荧光检查,只需按工艺说明书Q/2B366的要求检查焊缝外观质量:焊缝宽度沿全长应均匀一致,焊缝宽度均匀度为2mm,焊接接头上不允许有表面气孔、裂纹、烧穿、咬边、塌陷、未熔合、焊瘤和弧坑等缺陷,同时设计要求焊缝反面不允许有焊漏现象。因为无法确定精密钣金加工的叶形孔所产生的重铸层对该组件氩弧焊焊接质量的影响有多大。因此,需制定试验计划试切割零件以调整焊接参数,并按组件加工模式焊接试切割的叶形孔与叶片,以确定精密钣金重铸层对焊接质量的影响。 
Because the inner and outer rings of the rectifier are welded to the blades by argon arc welding, the weld is grade III weld and the weld is T shaped joint. After welding, the X light inspection and fluorescence inspection are not carried out. Only the appearance quality of the weld is checked according to the requirements of the process specification Q/2B366: the weld width should be uniform along the length, the weld width uniformity is 2mm, and the weld joints are not allowed to have surface pores, cracks, burn through, bite, collapse, unfusion, welding and arc pit. At the same time, the design requirements require no welding leakage on the reverse side of the weld. Because it is impossible to determine the influence of recast layer on the quality of argon arc welding produced by precision sheet metal processing. Therefore, it is necessary to set up an experimental plan to cut the parts to adjust the welding parameters, and to weld the leaf holes and blades of the cutting in order to determine the effect of the precision sheet metal recast layer on the welding quality.

精密钣金的特点:

第三,可切割多种材料。激光可用于金属材料和非金属材料的切割。

第四,清洁、安全、切割噪声相对较低、污染小,大大改善了操作人员的工作环境。 

第二,加工柔性好,效率高。切割过程可全部实现数控,能够切割任意形状的零件,可进行二维和三维切割。切割速度快,如采用2kW激光功率,8mm厚的碳钢切割速度可达到1.6m/min,2mm厚的不锈钢切割速度可达到3.5m/min。

第一,切割质量好。切口宽度窄(一般0.1——0.5mm)、热影响区小、变形极小、精度高(在300mm的范围内,一般孔中心距误差0.1——0.4mm,轮廓误差0.1——0.5mm)、切口表粗糙度好(一般Ra=12.5——25μm),并且切缝一般不需要再加工即可使用。

但由于某发动机已定型多年,一直以来叶形孔都是由冲压加工,若改精密钣金加工,无法确定精密钣金加工整流器内外环的叶形孔的工艺参数。

The features of precision sheet metal:

Third, a variety of materials can be cut. Laser can be used for cutting metal and non-metallic materials.

Fourth, cleanliness, safety, and cutting noise are relatively low and pollution is small, which greatly improves the working environment of operators.

Second, the processing flexibility is good and the efficiency is high. The cutting process can realize numerical control all the time. It can cut arbitrary shape parts and carry out 2D and 3D cutting. The cutting speed is fast. If 2kW laser power is used, the cutting speed of 8mm thick carbon steel can reach 1.6m/min, and the thickness of stainless steel 2mm can be cut to 3.5m/min.

First, the cutting quality is good. The width of the incision is narrow (0.1 - 0.5mm), the heat affected zone is small, the deformation is very small and the precision is high (in the range of 300mm, the center distance error of the general hole is 0.1 - 0.4mm, the outline error 0.1 - 0.5mm), the notch surface roughness is good (general Ra=12.5 - 25 mu), and the cutting seam is not needed to be reprocessed.

However, because a certain engine has been finalized for many years, all the leaf holes have been processed by stamping. If the precision sheet metal processing is changed, the process parameters of the blade hole in the inner and outer ring of the precision sheet metal processing rectifier can not be determined.

精密钣金是以高能量密度的激光作为切割刀具的一种材料加工方法。激光熔化切割是指用激光加热使金属熔化,然后通过与光束同轴的喷嘴吹惰性气体,依靠气体压力使液态金属排出并使激光束与材料沿一定轨迹作相对运动,从而形成一定形状的切缝。激光氧化切割是指用激光作为预热热源,用氧气等活性气体作为切割气体。喷出的气体一方面与切割金属作用,发生氧化反应并放出大量的氧化热;另一方面把熔融的氧化物和熔化物从反应区吹出,并使激光束与材料沿一定轨迹作相对运动,从而形成一定形状的切缝。

Precision sheet metal is a material processing method with high energy density laser as cutting tool. Laser melting cutting means melting the metal by laser heating, and then blowing inert gases with the coaxial nozzle of the beam, making the liquid metal discharged by gas pressure and making the laser beam and material moving relative along a certain trajectory, thus forming a certain shape of the slit. Laser oxidation cutting means using laser as preheating heat source, using oxygen and other active gases as cutting gas. On the one hand, the ejected gas can react with the cutting metal, oxidize and release a large amount of oxidation heat. On the other hand, the molten oxide and molten material are blown out from the reaction zone, and the laser beam and the material are relative moving along a certain trajectory, thus forming a certain shape of the slit.


标签:   钣金加工 钣金 精密钣金加工