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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不锈钢机箱钣金加工常见的加工工艺流程

2018-06-14 11:45:17 常州亿创钣金加工厂 阅读

一)材料的选用

机箱钣金加工一般用到的材料有冷轧板(SPCC)、热轧板(SHCC)、镀锌板(SECC、SGCC),铜(CU)黄铜、紫铜、铍铜,铝板(6061、6063、硬铝等),铝型材,不锈钢(镜面、拉丝面、雾面),根据产品作用不同,选用材料不同,一般需从产品其用途及成本上来考虑。

1、冷轧板SPCC,主要用电镀和烤漆件,成本低,易成型,材料厚度≤3.2mm。

2、热轧板SHCC,材料T≥3.0mm ,也是用电镀,烤漆件,成本低,但难成型,主要用平板件。

3、镀锌板SECC、SGCC。SECC电解板分N料、P料,N料主要不作表面处理,成本高,P料用于喷涂件。


4、铜;主要用导电作用料件,其表面处理是镀镍、镀铬,或不作处理,成本高。

5、铝板;一般用表面铬酸盐(J11-A),氧化(导电氧化,化学氧化),成本高,有镀银,镀镍。

6、铝型材;截面(机箱钣金加工)结构复杂的料件,大量用于各种插箱中。表面处理同铝板。

7、不锈钢;主要用不作任何表面处理,成本高。

二)图面审核

要编写零件的工艺流程,首先要知道零件图的各种技术要求;则图面审核是对精密钣金零件工艺流程编写的最重要环节。


1、检查图面是否齐全。

2、图面视图关系,标注是否清楚,齐全,标注尺寸单位。

3、装配关系,装配要求重点尺寸。

4、新旧版图面区别。

5、外文图的翻译。

6、表处代号转换。

7、图面问题反馈与处埋。

8、材料

9、品质要求与工艺要求

10、正式发行图面,须加盖品质控制章。

三)展开注意事项

展开图是依据零件(3D)展开的平面(2D)

1、展开方式要合,要便利节省材料及加工性

2、合理选择问隙及包边方式,T=2.0以下问隙0.2,T=2-3问隙0.5,包边方式采用长边包短边(门板类)3、合理考虑公差外形尺寸:负差走到底,正差走一半;孔形尺寸:正差走到底,负差走一半。

4、毛刺方向

5、抽牙、压铆、撕裂、冲凸点(包),等位置方向,画出剖视图

6、核对材质,板厚,以板厚公差

7、特殊角度,折弯角内半径(一般R=0.5)要试折而定展开

8、有易出错(相似不对称)的地方应重点提示

9、尺寸较多的地方要加放大图

10、需喷涂保护地方须表示

The selection of materials

The general materials used in machine box sheet metal processing are cold rolled plate (SPCC), hot rolled plate (SHCC), galvanized sheet (SECC, SGCC), copper (CU) brass, copper, beryllium copper, aluminum sheet (6061, 6063, hard aluminum, etc.), aluminum profiles, stainless steel (mirror, drawing surface, fog surface), according to the different products, the selection of different materials, the selection of material is different. It needs to be considered from the use and cost of the product.

1, cold rolled plate SPCC, mainly using electroplating and baking paint parts, low cost, easy to shape, material thickness ≤ 3.2mm.

2, hot rolled sheet SHCC, material T&ge, 3.0mm, is also used electroplating, baking paint parts, low cost, but difficult to shape, mainly using flat parts.

3, galvanized sheet SECC, SGCC. SECC electrolysis plate is divided into N material and P material. N material is mainly used for surface treatment and high cost. P material is used for spraying parts.


4, copper; mainly conductive parts, the surface treatment is nickel plated, chrome plated or not processed, and the cost is high.

5, aluminum plate; generally used surface chromate (J11-A), oxidation (conductive oxidation, chemical oxidation), high cost, silver plated, nickel plated.

6, aluminum profile; section (chassis metal sheet processing) complex structure of materials, a large number of various kinds of inserts. The surface is treated with the same aluminum plate.

7, stainless steel, mainly without any surface treatment, high cost.

Two) graphic examination

In order to write the process flow of parts, first of all, we should know all kinds of technical requirements of the part drawing, and the drawing surface review is the most important link in the process of the precision sheet metal parts.


1, check whether the surface of the map is complete.

2, the relationship between the graph and the view is clear, complete and dimensioned.

3, assembly relations, assembly requirements of the key dimensions.

4, the difference between the old and the new layout.

5. Translation of foreign language drawings.

6, table code conversion.

7. Feedback and burial of the problem of graph.

8. Materials

9, quality requirements and technological requirements

10, official distribution of the map, must be stamped with the quality control chapter.

Three) start the matters of attention

The expansion diagram is based on the plane (2D) of part (3D).

1, the way of expansion should be combined to facilitate material saving and processability.

2, the reasonable choice of the gap and the way of the edge, T=2.0 below the gap 0.2, the gap of the T=2-3 gap 0.5, the way to use the long side of the short side (door plate class) 3, reasonable consideration of the dimension of tolerance: negative difference in the end, the difference is half; hole size: the difference in the end, negative difference is half.

4. The direction of burr

5, draw teeth, press riveting, tear, bump (package), etc. position direction, draw a sectional view.

6. Check material, plate thickness, plate thickness tolerance

7. Special angle, the radius of bending angle (general R=0.5) should be measured and expanded.

8, where there are errors (similar asymmetry) should be highlighted.

9, the large size of the place to add a big picture

10. The need for spraying protection must be expressed



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