Hefei Zhongdu Technology has long been engaged in Anhui stainless steel processing , Hefei stainless steel processing , Anhui stainless steel products , Hefei stainless steel products , Hefei sheet metal , Hefei sheet metal parts , Hefei sheet metal processing , Anhui sheet metal processing , Anhui sheet metal , Anhui sheet metal parts , Anhui laser cutting processing , accumulated a large amount of experience in sheet metal processing .
Anhui stainless steel workpiece storage: should be a dedicated magazine, the magazine should be painted steel stent or rubber pad to pad, to isolate and carbon steel and other materials as wood or metal surfaces. When storing, the storage location should be easy to lift, and relatively isolated from other material storage areas. Protective measures should be taken to avoid contamination of stainless steel by dust, oil and rust.
Problems in the processing of stainless steel in Anhui !
1. Weld defect: The weld defect is serious, and it is compensated by manual mechanical grinding method. The resulting grinding marks cause uneven surface and affect the appearance.
2. Inconsistent surface: only the pickling passivation of the weld seam also causes uneven surface and affects the appearance.
3. Scratch is difficult to remove: the whole pickling passivation can not remove all the scratches generated during the processing, and can not remove the carbon steel, splash and other impurities adhered to the stainless steel surface due to scratches and welding splashes. Causes rusting due to chemical or electrochemical corrosion in the presence of corrosive media.
4. Grinding and polishing passivation unevenness: After picking and polishing, pickling and passivation treatment is carried out. For a workpiece with a large area, it is difficult to achieve a uniform and uniform treatment effect, and an ideal uniform surface cannot be obtained. And the cost of working hours and the cost of auxiliary materials are also high.
5. Limited pickling ability: Pickling passivation paste is not a panacea, it is difficult to remove for plasma cutting, flame cutting and black scale.
6. Scratches caused by human factors are more serious: in the process of hoisting, transportation and structural processing, scratches caused by human factors such as bumping, dragging and hammering are serious, which makes the surface treatment more difficult and also causes corrosion after treatment. The main reason.
7. Equipment factors: In the process of profile, sheet bending and bending, scratches and creases are also the main cause of corrosion after treatment.
8. Other factors: In the process of procurement and storage of stainless steel raw materials, bumps and scratches caused by lifting and transportation are also serious, and it is also one of the causes of rust.
Anhui stainless steel processing parts hoisting: When hoisting, special spreaders should be used, such as slings , special chucks, etc. It is strictly forbidden to use steel wire rope to avoid scratching the surface ; and when lifting and placing, avoid impact and bumping.
Transportation of stainless steel processing parts in Anhui : When transporting, use transportation tools ( such as trolleys, battery cars, etc. ) , and clean and isolate protective measures to prevent dust, oil and rust from contaminating stainless steel. Do not drag and drop to avoid bumps and scratches.
Processing of stainless steel processing parts in Anhui
1. Processing area: The processing area of ​​stainless steel parts should be relatively fixed. The platform of the stainless steel processing zone should be isolated, such as rubber mats. The fixed management and civilized production of the processing zone of stainless steel parts should be strengthened to avoid damage and pollution to stainless steel parts.
2. Unloading: The cutting of stainless steel parts is made by shearing or plasma cutting, sawing, etc.
a. Shearing: When cutting, it should be isolated from the feeding bracket. The falling hopper should also be covered with rubber mat to avoid scratching.
b. Plasma cutting: After plasma cutting, the cutting slag should be cleaned up. When cutting in batches, the existing parts should be cleaned up in time to avoid smudging of the workpiece.
c. Sawing and cutting: When sawing and cutting, the clamping should be protected by rubber. After sawing, the oil and residue on the workpiece should be cleaned.
Machining: Stainless steel parts should also be protected during machining such as turning, milling, etc. The oil stains, iron filings and other debris on the surface of the workpiece should be cleaned up.
Molding processing: In the process of coiling and bending, effective measures should be taken to avoid scratching and creases on the surface of stainless steel parts.
Welding of stainless steel machining parts in Anhui
Stud welding: When the stainless steel parts are paired, the forced assembly should be avoided, especially the flame grilling assembly is avoided. If there is temporary plasma cutting during the group or manufacturing process, isolation measures should be taken to avoid contamination of other stainless steel parts by the slag. After cutting, the slag on the workpiece should be cleaned.
Welding: Stainless steel parts must be carefully cleaned of oil, rust, dust and other debris before welding. When welding, argon arc welding should be used as much as possible. When using manual arc welding, small current and fast welding should be used to avoid swinging. It is strictly forbidden to start the arc in the non-welding area. The grounding wire is in proper position and connected firmly to avoid arc abrasion. Anti-splash measures ( such as brushing white ash ) should be taken during welding . After welding, use stainless steel ( not carbon steel ) flat shovel to thoroughly clean the slag and splash.
Multi-layer welding: When welding in multiple layers, the interlayer slag must be removed. For multi-layer welding, the interlayer temperature should be controlled, generally not exceeding 60 °C .
Weld: The weld joint shall be ground. The surface of the weld shall be free from defects such as slag, pores, undercuts, splashes, cracks, unfused, and incomplete penetration. The weld and the base metal shall be smooth and transition, not lower than the base metal. .
Orthopaedic: The orthopedics of stainless steel parts should avoid the use of flame heating methods, especially the repeated heating of the same area. When orthopedic, try to use mechanical devices, or use a wooden hammer ( rubber hammer ) or a rubber pad to hammer, do not hammer with a hammer to avoid damage to stainless steel parts.