1. Surface finish and flatness
No defects: 非标准硬件零件处理工件的表面应没有明显的毛刺, 斑点, 锈斑, 敲门, scratches, claw marks, scratches, positioning line marks and other defects.
Uniformity: The knife marks on the surface of non-standard hardware parts processing parts should be uniform, and there should be no obvious knife marks and coarse knife marks, and there should be no vibration marks on the grinding surface. For parts with larger sizes, obvious knife marks should be avoided when connecting the knife.
No irregular lines: Especially for stainless steel sheet metal parts, irregular lines should not appear on the surface after grinding.
2. Color and texture consistency
For the same part or the same batch of parts: When baking paint, the surface texture density and direction must be consistent, the color must be consistent with the sample color, and the baking paint thickness is usually about 0.15mm. Before baking paint, rust removal, pickling and other processes may be required, and anti-rust primer should be sprayed.
Other surface treatments: For parts that have been anodized, electroplated, blackened, electrophoresed, 等, there should be no spots or obvious color differences on the surface, and impurities such as pickling liquid in the hole must be cleaned up.
3. 焊接质量
Weld seam quality: The weld seam must be flat, smooth and uniform, without leaking welds. Before welding, the surface dirt in the welding area should be cleaned, such as rust, oxide scale, oil stains, paint, 等. There are no pores, cracks, slag inclusions, burn-throughs, large deformations, 等. in the weld seam, and welding slag and spatter must be thoroughly removed.
Weld point requirements: Unless otherwise specified in the drawings, welded parts should be fully welded and the weld seam should be continuous. If the drawing indicates that spot welding is used, the spacing and size of the welding spots must be equal, and no obvious difference should occur.
4. Anti-rust treatment
Use of anti-rust oil: For parts that have not been surfaced or blackened, high-quality anti-rust oil should be used for anti-rust treatment, but lipid anti-rust agents should not be used for easy cleaning and measurement.
Circulation and transportation protection: Protective measures should be used during the circulation and transportation of parts to avoid damage to the parts during circulation.
5. Accuracy and tolerance
尺寸精度: The processing of non-standard hardware parts usually requires extremely high processing accuracy, 包括尺寸精度, shape accuracy and position accuracy. The specific tolerance range may be determined according to the specific requirements of the workpiece, but it is generally necessary to control it within a reasonable range.
