常州亿创钣金加工厂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

常州亿创钣金加工厂

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钣金加工生产钣金工艺验收标准详解

2018-06-28 23:13:57 常州亿创钣金加工厂 阅读

钣金加工生产钣金工艺验收标准详解

钣金加工生产:按钣金件的基本加工方式,如下料、折弯、拉伸、成型、焊接。本规范阐述每一种加工方式所要注意的工艺要求。下料根据加工方式的不同,可分为普冲、数冲、剪床开料、激光切割、风割,由于加工方法的不同,下料的加工工艺性也有所不同。钣金下料方式主要为数冲和激光切割折弯 材料弯曲时,其圆角区上,外层收到拉伸,内层则受到压缩。当材料厚度一定时,内r越小,材料的拉伸和压缩就越严重;当外层圆角的拉伸应力超过材料的极限强度时,就会产生裂缝和折断,因此,弯曲零件的结构设计,应避免过小的弯曲圆角半径。拉伸:拉伸件底部与直壁之间的圆角半径应大于板厚,即r1≥t。

Detailed interpretation of sheet metal process acceptance criteria for sheet metal processing

Sheet metal processing production: according to the basic processing method of sheet metal parts, the following materials, bending, stretching, forming, welding. This specification states the technological requirements to be noted in every processing method. According to the different processing methods, the blanking can be divided into general punching, number punching, cutting bed cutting, laser cutting, and wind cutting. Because of the different processing methods, the processing technology of the blanking is also different. The method of sheet metal blanking is mainly punching and laser cutting. When bending material is bent, the outer layer is stretched and the inner layer is compressed.When the thickness of the material is fixed, the smaller the inner R, the more serious the tensile and compression of the material; when the tensile stress of the outer corner is more than the ultimate strength of the material, the crack and fracture will be produced. Therefore, the structure design of the curved part should avoid the small radius of the bending corner. Stretching: the fillet radius between the bottom part of the drawing piece and the straight wall should be greater than the thickness of the plate, that is, R1 equal to t.

为了使拉伸进行得更顺利,一般取r1=(3~5)t,最大圆角半径应小于或等于板厚的8倍,即r1≤8t。拉伸件由于各处所受应力大小各不相同,使拉伸后的材料厚度会发生变化。一般来说,底部中央保持原来的厚度,底部圆角处材料变薄,顶部靠近凸缘处材料变厚,矩形拉伸件四周圆角处材料变厚。成型:在板状金属零件上压筋,有助于增加结构刚性,百叶窗通常用于各种罩壳或机壳上起通风散热作用,其成型方法是借凸模的一边刃口将材料切开,而凸模的其余部分将材料同时作拉伸变形,形成一边开口的起伏形状。焊接 焊接方法主要有电弧焊、电渣焊、气焊、等离子弧焊、熔化焊、压力焊、钎焊,钣金产品焊接主要为电弧焊、气焊。
In order to make the tensile work more smoothly, generally r1= (3~5) t, the maximum fillet radius should be less than or equal to 8 times the thickness of the plate, that is, R1 is less than 8t. Due to the different stress sizes of the drawing parts, the thickness of the stretched material will change. In general, the bottom center keeps the original thickness, the material at the bottom corner is thinner, the top is closer to the flange and the material becomes thicker, and the rectangular tensile parts are thickened around the round angle. Molding: the reinforcement on the sheet metal parts helps to increase the rigidity of the structure. The blinds are usually used for ventilation and heat dissipation on various shrouds or shells. The molding method is to cut the material by the edge of the punch, while the rest of the punch makes the material stretching and deformation at the same time, forming the undulating shape of the opening. The welding methods are mainly arc welding, electroslag welding, gas welding, plasma arc welding, melting welding, pressure welding and brazing. The welding of sheet metal products is mainly arc welding and gas welding.

电弧焊具有灵活、机动,适用性广泛,可进行全位置焊接;所用设备简单、耐用性好、维护费用低等优点。但劳动强度大,质量不够稳定,决定于操作者水平。适用焊接3mm以上的碳钢、低合金钢、不锈钢和铜、铝等非铁合金气焊火焰温度和性质可以调节,于弧焊热源比热影响区宽,热量不如电弧集中,生产率低 应用于薄壁结构和小件的焊接,可焊钢,铸铁,铝,铜钣金机箱的验收标准检验、验收场地可在承造厂或甲方指定的产品到货地,其结果应一致,且以终到地结果为最终结果。
Arc welding has many advantages such as flexibility, maneuverability, wide applicability, all position welding, simple equipment, good durability and low maintenance cost. But the labor intensity is large and the quality is not stable. It depends on the operator level. The flame temperature and properties of carbon steel, low alloy steel, stainless steel and copper and aluminum alloy gas welding above 3mm can be adjusted, the arc welding heat source is wider than heat, the heat is less than the arc concentration, the low productivity is applied to the welding of thin wall structure and small parts, and the acceptance mark of the welded steel, cast iron, aluminum and copper sheet metal chassis is used. The results of the quasi inspection and acceptance sites can be consistent in the products delivered to the manufacturer or the products designated by Party A, and the final result will be the final result.

验收标准:

参考:1.箱体底面及其他侧面平面度为1mm。2.箱体前后或左右立面相对底面地垂直度为1mm。3. 面板的顶面和底面平行度为0.5mm,侧面和底面垂直度为0.5mm。4. 面板装入箱体后,应垂直端正,其侧面与箱体底面垂直度为0.5mm,底面和箱体底面的平行度为0.5mm。5.安装电路板或机箱的插框,需用工装模拟电路板或机箱进行装配,工装装入、拔出插箱时应顺畅,装入插箱后,应妥贴稳固,无漂浮、松动现象。硬连接的接插件应对位准确,插入、拔出无异常阻滞。

Acceptance criteria:

Reference: 1. the flatness of the bottom and other sides of the box is 1mm. 2. the perpendicularity of the front and rear sides of the box is about 1mm. The parallelism of the top and bottom of the 3. panel is 0.5mm, and the verticality of the side and bottom is 0.5mm. 4. the panel should be upright after loading into the box. The verticality of the side and the bottom of the box is 0.5mm, and the parallelism of the bottom and the bottom of the box is 0.5mm. 5. install the plug of the circuit board or the chassis, need to use the tooling analog circuit board or the chassis for assembly, the tooling loading, pulling out the box should be smooth, loaded into the box, should be appropriate and stable, no floating, loose phenomenon. The rigid connector should be positioned accurately, inserted and pulled out without any abnormal block.



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