After assembly, the fixed end surface of the guide post should keep a distance of 1~2mm from the lower plane of the lower mold base. When using the B-type guide sleeve, the fixed end surface after assembly is 1~2mm lower than the upper plane of the upper mold base..05mm within the full length. The mold should be tested under the conditions produced, and the punched parts should meet the design requirements.

The matching clearance of the punch and the die should meet the design requirements, and the contour should be uniform along the entire edge. After the assembled mold base, the upper mold base should move up and down along the guide column smoothly without blocking. After the mold handle is installed in the upper mold base, the perpendicularity error of its axis line to the upper plane of the upper mold base shall not exceed. The upper plane of the upper mold base should be parallel to the bottom plane of the lower mold base. The positioning device must ensure correct and reliable positioning.

The matching clearance value of each pair of guide posts and guide sleeves installed in the mold base should meet the specified requirements.The unloading and top piece device is flexible and correct, and the discharge hole is unobstructed to ensure that the parts and waste are not stuck in the die.The closed height of the assembled die should meet the design requirements.After the Wholesale INA Bearings Suppliers guide post and the guide set are matched, their axis lines should be perpendicular to the bottom plane of the lower mold base and the upper plane of the upper mold base respectively.

The oxidation treatment of steel and alloy is also called bluing or blackening treatment. Because of its low cost, high efficiency, fast yield, stable process, convenient operation and simple equipment, the application range is very wide. Once quality problems occur during acceptance or use, it is convenient for quality accident analysis and improvement.

There are many factors that affect the quality of the coating, such as: pre-plating, the method and degree of purification of the plating solution, the rationality of the pre-plating method, the establishment of the plating solution system, the determination of combination and thickness, and the process parameters (PH value, temperature, current density) , Additives (brightener, leveling agent, stress reliever, wetting agent, dispersant), plating solution analysis and replenishment system, operation system, post-plating treatment (dehydrogenation, sealing), etc. 

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